KN95 N95 máscaras FFP2 certificado CE Máscara de protecção

De Ardósia natural de ardósia irregulares Net Bandeira Mosaico pedra para pavimentação Jardim/Papel Kraft Fio redondo /Testar Máquinas de fabrico papel da Camisa

Papel de pedra máquina fundição3 descartáveis não médicos Máscara facial Ply Fabricante Máscaras de protecçãoTelefone celular musicais originais para a Vivo Y51s Smart Phone Carga Rápida Postposition três telemóveis 5G da câmara3 polegadas médio direito Caster rígida com roda de PPAlta Qualidade 3D Mask individualmente Original Pack fôlego Máscara de valor3 Ply Designers de protecção Máscara facial Mascarillas elevada filtração e fácil sopro máscara descartável personalizadaMédio direito Caster Wheelbarrow delicadasPt149 Non-Mdical Boa máscara de respiração melhor em 3sulcar Non-Woven descartável facial com preço mais barato

ABSTRACT

Fourier transform infrared spectroscopy techniques, associated or not to others, are a well-studied subject used for characterizing polymers/Barato de malha ardósia calçada para caminho Jardim. However, the infrared analyses are usually qualitative and performed using the mid-infrared. This paper discusses the Fourier transform infrared spectroscopy qualitative and quantitative methodologies, coupled or not with thin layer chromatography and thermogravimetric analysis,Papel higiênico corte longitudinal rebobinador automático da máquina de enrolamento papel higiénico e rolo, in some cases, using mid-infrared, near-infrared and far-infrared regions, by traditional accessories and the latest generation spectra mode, universal attenuated total reflection.Padrão de lajes ardósia multicor, emphasizing studies usually carried out in the last five years. A critical assessment and future trends were included.

Keywords
Sublimação de pedra ardósia fotográfico em Branco com moldura madeira ; Energetic material; FT-IR; Methodologies

INTRODUCTION

STUDIES ABOUT BINDERS OF PROPELLANTS

As well-known, hydroxyl-terminated polybutadiene (HTPB) reacts with isocyanate (curing agent) to obtain polyurethane (PU) formation and it is the usual binder used in solid propellant grain of the rocket motors. Thus, the determination of its hydroxyl (-OH) and isocyanate (-NCO) groups by instrumental techniques is an important parameter for predicting properties of these composites.

Hydroxyl and isocyanate numbers could be faster determined by Fourier transform infrared spectroscopy (FT-IR) methodologies than wet chemical method, and the functionality distribution of HTPB binder, by specific methodology, is a good example and we can include these determinations among the several studies, developed in our laboratories (Takahashi . 1996Takahashi MFK, Dutra RCL, Diniz MF, Polito WL (1996) Determinação de índices de hidroxila em polibutadienos hidroxilados e de grupos NCO em diisocianatos e pré-polímeros por espectroscopia no infravermelho com transformada de Fourier. Polímeros 6(4):45-52.;Lourenço . 2006Lourenço VL, Kawamoto AM, Sciamareli J, Rezende LC, Pires DC, Takahashi MFK, Berdugo AV, Cruz SM, Dutra RCL, Soares BG (2006) Determinação da distribuição de funcionalidade de HTPB e verificação de sua influência no comportamento mecânico de poliuretano utilizado em motor-foguete. Polímeros 16(1):66-70.).

Takahashi . (1996)Takahashi MFK, Dutra RCL, Diniz MF, Polito WL (1996) Determinação de índices de hidroxila em polibutadienos hidroxilados e de grupos NCO em diisocianatos e pré-polímeros por espectroscopia no infravermelho com transformada de Fourier. Polímeros 6(4):45-52.applied FT-IR analysis for determining contents of hydroxyl groups (IOH) in HTPB resins and free NCO groups in diisocyanates and NCO-terminated prepolymers. FT-IR methodology provided accurate results equivalent (IOH) or higher (% NCO) than classic wet methods and within the FT-IR instrument accuracy limit, ≤ 2%. The FT-IR methodology has the additional advantages of being fast, inexpensive and requiring small amount of sample and solvent, e.g. CS2(IOH) and CCl4(% NCO). These methods have some advantages that may be useful in industries and research centers, especially to those who work with polyurethanes, for characterization of raw materials (resins and isocyanates) and product control (NCO-terminated prepolymers).

This methodology for determining hydroxyl groups is important, but it is necessary to know how these groups were distributed in the molecular chain.Lourenço . (2006)Lourenço VL, Kawamoto AM, Sciamareli J, Rezende LC, Pires DC, Takahashi MFK, Berdugo AV, Cruz SM, Dutra RCL, Soares BG (2006) Determinação da distribuição de funcionalidade de HTPB e verificação de sua influência no comportamento mecânico de poliuretano utilizado em motor-foguete. Polímeros 16(1):66-70.developed a size exclusion chromatography (SEC) methodology, with double detection, to determine the functionality distribution of HTPB polymer. This method showed to be sensitive to small differences in the functionality distribution of the HTPB, affecting the tensile tests performed with HTPB polyurethane.

Recent study about HTPB was developed byClemente . (2014)Clemente M, Rocha RJ, Iha K, Rocco JAFF (2014) Desenvolvimento de tecnologia de pré-polímeros na síntese de poliuretanos empregados em combustíveis sólidos. Quím Nova 37(6):982-988. doi: 10.5935/0100-4042.20140154
Fábrica Haiyang Qualidade elevada por escrito e papel de impressão fazendo a máquina
. Polyurethane polymer matrix was synthesized using polyols as a raw material to obtain a binder such as (HTPB) prepolymer in energetic material formulation. They concluded that the soybean-based polyol was the best starting raw material for producing binder. Characterization of the binder was carried out by employing FT-IR analysis to the mid-infrared (MIR) region and thermal techniques, such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). Glass transition (Tg) (−39 °C) of the polyol derived from soybean oil was determined by employing DSC technique. It was considered a good value because the Tg of the HTPB-based polymer matrix is around −50 °C. By TG, it was possible to evaluate the thermal degradation process of polymer obtained and to determine the activation energy (Ea) (122.4 kJ∙mol−1), whose value is very close to the HTPB-based polymer matrix. Thus, the application of synthesized material as solid fuel has shown promising results for tests in rocket engines. They showed good results by using soybean-based polyol as a raw material to obtain a binder, such as HTPB prepolymer in energetic material formulation, but the IR region used for the qualitative characterization was just the usual MIR.

The energetic binders are usually low-molecular-weight hydroxyl-terminated polyethers, with nitro or azido groups, capable of holding together fuel and oxidizer compounds from the propellant. These chemical groups give a significant contribution to the propellant impulse characteristics. The energetic binders can produce propellants systems in which metal fuels, such as aluminum, can be reduced. Glicidyl azide polymer (GAP) (Kawamoto . 2008Kawamoto AM, Barbieri U, Keicher, T, Krause H, Holanda JAS, Kaiser M, Polacco G (2008) Synthesis and characterization of glycidyl azide-r(3,3-bis(azidomethyl) oxetane) copolymers. Propellants Explos Pyrotech 33(5):365-372. doi: 10.1002/prep.200700221
Tipo fixo de serviço pesado PU roda pivotante D160-76F125x50)
;Sciamareli . 2009aSciamareli J, Costa JR, Takahashi MFK, Diniz MF, Lourenço VL, David LH, Iha K, Miyano MH, Ferreira C (2009a) Síntese e caracterização do polímero energético metil azoteto de glicidila (GAP) via análises instrumentais. Polímeros 19(2):1-4. doi: 10.1590/S0104-14282009000200008
Máquina de Fazer Envelope expresso
,2009bSciamareli J, Costa JR, Takahashi MFK, Iha K, Berdugo AAV, Diniz MF, Miyano MH, Ferreira C (2009b) Otimização do processo de obtenção do pré-polímero metil azoteto de glicidila.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(1):29-34. doi: 10.5028/jatm.2009.01012934
220V 2
), GAP/BAMO (Kawamoto . 2010Kawamoto AM, Diniz MF, Lourenço VL, Takahashi MFK, Keicher T, Krause H, Menke K, Kempa PB (2010) Synthesis and characterization of GAP/BAMO copolymers applied at high energetic composite propellants.10ton Cultura Papel de cópia A4 máquina fazer toda a linha produção papel(3):307-322. doi: 10.5028/jatm.2010.02037910
Golden Ardósia Pedra Natural Painel Empilhada
), poly[3,3-bis(azidomethyl)oxetane] (poly-BAMO) and 3-azidomethyl-3-methyl oxetane polymer (poly-AMMO) (Oliveira . 2006Oliveira JIS, Diniz MF, Kawamoto AM, Dutra RCL, Keicher T (2006) MIR/NIR/FIR characterization of poly-AMMO and poly-BAMO and their precursors as energetic binders to be used in solid propellants. Propellants Explos Pyrotech 31(5):395-400. doi: 10.1002/prep.200600054
9 FT Estrela de ardósia Amercian bilhar
,2007Oliveira JIS, Dutra RCL, Diniz MF, Kawamoto AM, Keicher T (2007) Determination of CHN content in energetic binder by MIR analysis. Polímeros 17(1):43-47. doi: 10.1590/S0104-14282007000100011
KN95 FFP2 N95 descartável e pó de Segurança Non-Woven Tecido Melt-Blown protecção laboral 3D dobre a poeira da máscara facial com filtração Earloop Efficienc 95%
;Kawamoto . 2009Kawamoto AM, Oliveira JIS, Dutra RCL, Rezende LC, Keicher T, Krause H (2009) Synthesis and characterization of energetic thermoplastic elastomers for propellant formulations.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(1):35-42. doi: 10.5028/jatm.2009.01013542
13 Ardósia Pedra Clading na parede
)Venda por grosso Adulto Sport Cavalo andar de máscara mergulho com snorkel.

In relation to FT-IR characterization methodologies of energetic materials used in propellants, it is possible to include the characterization of poly-AMMO and poly-BAMO and their precursors as energetic binders in the near-infrared (NIR), MIR and far-infrared (FIR) regions byOliveira (2006)Oliveira JIS, Diniz MF, Kawamoto AM, Dutra RCL, Keicher T (2006) MIR/NIR/FIR characterization of poly-AMMO and poly-BAMO and their precursors as energetic binders to be used in solid propellants. Propellants Explos Pyrotech 31(5):395-400. doi: 10.1002/prep.200600054
Aço revestido a cores de alta qualidade folha/Coil
. Their study was focused on the characterization of polymers containing energetic groups that have been synthesized at ICT (Fraunhofer Institute for Chemical Technology) group, an important Germany Research Center of propellants. This characterization identified analytical bands and allowed quantitative and/or kinetic studies of these compounds, using the whole spectral ranges of NIR/MIR/FIR. Basically, it was possible to visualize differences between chemical structures of these compounds and also to identify spectrometric changes (formation or disappearance of functional groups)Pó de grossista N95 KN95 FFP2 4 lonas máscara descartável para fornecedores segurança. It is also possible to use the absorptions around 4200, 2100 and 550 cm-1as analytical bands to study these compounds containing azide groups for quantitative determinations. Bands found in the region of 1250 and 660 cm-1can be used in similar studies of Br-substituted binders. Bands near 980 cm-1can be used to study the ring opening polymerization reaction of compounds containing azide and/or bromine.

Oliveira . (2007)Oliveira JIS, Dutra RCL, Diniz MF, Kawamoto AM, Keicher T (2007) Determination of CHN content in energetic binder by MIR analysis. Polímeros 17(1):43-47. doi: 10.1590/S0104-14282007000100011
3 Facial Máscaras Faciais Earloop Ply máscara descartável
analyzed azide polymers samples by FT-MIR in order to develop a quantitative methodology to determine the C, H and N content in energetic polymers used in propellants. The elemental analysis data were used as reference. The FT-MIR results showed a good agreement with CHN analysis, and a good linear relationship was obtained, suggesting that the developed methodology can be useful for quality control of these energetic polymers.

In another study about energetic material (Ribeiro . 2012Ribeiro SP, Santiago DG, Vianna Jr AS (2012) Poli (Metil Azoteto de Glicidila) – GAP. I. Síntese e caracterização. Polímeros 22(5):407-413. doi: 10.1590/S0104-14282012005000045
3 Ply Designers de protecção Máscara facial Mascarillas elevada filtração e fácil sopro máscara preta descartável personalizada
), GAP was synthesized and characterized by FT-IR, ultraviolet spectroscopy (UV), nuclear magnetic resonance spectroscopy (NMR), DSC, elemental analysis (CHN), TG and SEC. Through these conventional techniques, it was possible to identify the material content and some of its properties related to its use as an energy plasticizer in propellants. This new method with dimetylformamide (DMF) solvent was effective in obtaining high molecular weight, high yield and better conversion of azide.

Oliveira . (2014)Oliveira JIS (2014). Síntese e caracterização do oxidante ADN (dinitramida de amônio), usado em propelentes para aplicação aeroespacial (PhD thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.evaluated the interaction between two energetic polymer/oxidizer systems, GAP and ADN (ammonium dinitramide, a chlorine-free oxidizer) as well as GAP and AP (ammonium perchlorate) by FT-IR spectroscopy, in the NIR and MIR regions. Major spectrometric changes were observed for the GAP/ADN system, with a broadening of the bands in the region between 3100 – 3500 cm-1, pointing to interactions between OH groups from GAP and NH4+groups from ADN or AP. A decrease in band intensity was observed for the N3group in GAP as well as an increase of nitronium (NO2+) of ADN, suggesting interaction between these groups in the GAP/ADN system.

POLYMERS USED IN COATING PROCESS OF ENERGETIC MATERIALS

FT-IR surface techniques have been used for characterization and/or quantification of different polymers applied in coating process of energetic material (Luz do Separador de impurezas processamento celulose. 2004aPiso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Dutra RCL, Iha K (2004a). Avaliação do uso de técnicas FT-IR para caracterização de cobertura polimérica de material energético. Polímeros 14(2):63-68. doi: 10.1590/S010414282004000200007
A China a natureza aleatória de ardósia pavimentação em mosaico mármore e pedra parede rebordo
,2004bPiso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Viganó I, Iha K, Dutra RCL (2004b) Application of FT-IR techniques for identification of different polymers used in the coating process of energetic materials. Proceedings of the International Annual Conference of the Fraunhofer ICT, 147; Karlsruhe, Germany,2008Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Moreira ED, Diniz MF, Dutra RCL, Silva G, Iha K, Teipel U (2008) Characterization of polymer-coated RDX and HMX particles. Propellants Explos Pyrotech 33(1): 44-50. doi: 10.1002/ prep.200800207
Sala fria com unidade de refrigeração Mini Unidade Refregaration monobloco para fins comerciais
;2009Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Nakamura NM, Dutra RCL (2009) Determination of polymer content in energetic materials by FT-IR.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(2):167-175. doi: 10.5028/jatm.2009.0102167175
O'verde/Doupro/Suçuarana Semi grossista da marca de Pneus Caminhão Radial 12.00R24
).

Luz do Separador de impurezas processamento celulose. (2008)Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Moreira ED, Diniz MF, Dutra RCL, Silva G, Iha K, Teipel U (2008) Characterization of polymer-coated RDX and HMX particles. Propellants Explos Pyrotech 33(1): 44-50. doi: 10.1002/ prep.200800207
Pavimentação de malha ardósia natural pedra para Paisagismo
made a surface characterization of RDX/fluoroelastomer (Viton®) system by FT-IR techniques such as transmission, photoacoustic (PAS) and attenuated total reflectance (ATR). The transmission spectrum of the cast film showed some evidence of the presence of fluoroelastomer, which covers the energetic material. ATR showed excellent results to analyze HMX/Viton® system for characterization of Viton® bands.

Luz do Separador de impurezas processamento celulose. (2009)Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Nakamura NM, Dutra RCL (2009) Determination of polymer content in energetic materials by FT-IR.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(2):167-175. doi: 10.5028/jatm.2009.0102167175
Máscara de respiração descartáveis máscara pó madeira
developed a new FT-IR methodology to characterize quantitatively the polymer content in PBX (HMX/Viton®) using the TG as reference technique. ATR was used as surface technique and showed excellent results, being faster than the usual methodologies, as high performance liquid chromatography (HPLC).

According toTourné (2013)Tourné M (2013) Developments in explosives characterization and detection. J Forensic Res S12:1-10. doi: 10.4172/2157-7145.S12-002
3 Ply Máscara facial descartável
, in the field of explosives and other energetic materials, detection and characterization brought new challenges. Detection schemes at the molecular level provide a wide variety of analytical technique, such as Raman, Infrared (IR) and Mass Spectroscopy, among others. However, studies cited in the IR part of her paper are only about the characterization of explosives without reference to polymer/explosive (PBX); probably, the main objective was only to identify some micromolecules. Thus, qualitative characterization and quantification of polymer that can be found on the surface of this system can be contributive for the area of energetic materials.

THERMAL INSULATION STUDIES

RUBBERS

Main methodologies developed by AQI group on rubbers, such as natural rubber (NR), ethylene propylene diene monomer (EPDM) and butadiene and acrylonitrile copolymer (NBR)Banheira de vender a cultura ardósia para parede pedra , are discussed below and related to other publications (Lanxess Rubber 2012Lanxess Rubber (2012) Catalogo técnico – determinação do conteúdo de eteno, ENB e VNB no EP(D)M.;ASTM D3900 – 05a 2010American Society for Testing and Materials (ASTM) D3900 – 05a (2010) Determination of Ethylene Units in Ethylene-Propylene Copolymers (EPM) and in Ethylene-Propylene-Diene Terpolymers (EPDM) by Infrared Spectrometry, Annual Book of ASTM Standards, Philadelphia.;Chitta 2014Chitta R (2014) Development of high temperature liquid chromatography for chemical composition separation of polyolefins (PhD thesis). Darmstadt: Technischen Universität Darmstadt.). The topics are organized by methodologies, including also the IR or FT-IR techniques couplings with thin layer chromatography (TLC/IR) (Dutra 1996Dutra RCL (1996) Aplicação de técnica TLC-IR em estudos de separação, identificação e quantificação de aditivos em borrachas. Polímeros 6(2):26-31.;Damazio 2015Damazio DB (2015) Caracterização por FT-IR e TLC de EPDM (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.;Damazio . 2014Damazio DB, Diniz MF,Multicolor ardósia do painel de parede para decoração, Dutra RCL (2014) Determinação por FT-IR de transmissão e reflexão (UATR) de etileno e propileno em EPDM. Polímeros 24(6):703-710. doi: 10.1590/0104-1428.1536
Sólidos de madeira carvalho branco Western Restaurante Cadeira Jantar jantar
,2015Damazio DB (2015) Caracterização por FT-IR e TLC de EPDM (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.) and thermogravimetric analysis (TG/FT-IR) (Sanches 2015Sanches NB (2015) Caracterização de proteções térmicas de EPDM por PIR-G/FT-IR e TG/FT-IR (PhD thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.;Sanches . 2014Sanches NB, Cassu SN, Diniz MF, Dutra RCL (2014) Characterization of additives typically employed in EPDM formulations by using FT-IR of gaseous pyrolyzates. Polímeros 24(3):269-275. doi: 10.4322/polimeros.2014.066
Agente de transporte porta a UPS DHL FedEx TNT Express para Estónia da China com preço barato
,2015Sanches NB, Cassu SN, Dutra RCL (2015) TG/FT-IR characterization of additives typically employed in EPDM formulations. Polímeros 25(3):247-255. doi: 10.1590/0104-1428.1819
Branco/Preto/Amarelo/Verde/Enferrujados Cultura Ledgestone/Fieldstone/pedra ardósia para revestimento de paredes Decoration/parede externa/Paisagismo pedra na parede
).

TLC and IR Methods for the Characterization of Rubbers and Their Additives

Analysis of vulcanized elastomer composition is often an important quality control requirement and suitable for determining rubber formulation.Dutra (1996)Dutra RCL (1996) Aplicação de técnica TLC-IR em estudos de separação, identificação e quantificação de aditivos em borrachas. Polímeros 6(2):26-31.developed a methodology for separating and identifying additives in rubber, by TLC/IR coupling techniques. This study was carried out by two methods: one that uses potassium bromide (KBr) pyramids and another, more simple, without the use of pyramids, to reduce costs.

According to the first method, the material obtained by solvent extraction is applied in an appropriate silica plate, in which it is developed in a closed vessel chromatography, using a mobile phase. The plate is dried and reveals deposits with suitable developer. Deposits are scraped and placed in a tube containing KBr pyramids. Small amount of solvent used in the extraction is added to bring the sample to the top of the pyramid. After solvent evaporation, this top is removed, crushed and compressed in the form of KBr disc for transmission infrared analysis. Basically, in the second method, the deposits are scraped and treated with the solvent used in the extraction, filtered to remove silica, dried, mixed with KBr (200 mg) in order to obtain pellets and analyzed by transmission.

It was concluded that the TLC/IR coupling, for both methods, is particularly useful for polymer research centers to expand knowledge on identification and characterization of the main constituents of rubbers, such as antioxidants and plasticizers in previously known formulations. The choice of a suitable analysis condition allows the evaluation of other components.

The development of quantitative methods which detect low content of components of elastomeric system, especially in compounds, is still a challenge.Damazio . (2014)Damazio DB, Diniz MF,Multicolor ardósia do painel de parede para decoração, Dutra RCL (2014) Determinação por FT-IR de transmissão e reflexão (UATR) de etileno e propileno em EPDM. Polímeros 24(6):703-710. doi: 10.1590/0104-1428.1536
Custom-Made cadeira de madeira com Assento Rush Cadeira jantar em Restaurante
developed a methodology by FT-IR (UATR and transmission techniques) for determining the ethylene (ET) and propylene (P) content on rubber samples (neat, raw and vulcanized elastomer) EPDM (ethylene propylene diene monomer),Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis protetora para venda Anti virus. Both techniques showed good accuracy, being UATR analysis the most appropriate for neat elastomer. Transmission/pyrolysis was suitable for analyzing all types of EPDM (neat, raw and vulcanized elastomer), suggesting to be useful for similar formulations.

Damazio . (2015)Damazio DB (2015) Caracterização por FT-IR e TLC de EPDM (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.developed a method using FT-IR transmission for determining the content of 5-ethylidene-2-norbornene (ENB) on rubber samples (neat elastomer) burned in controlled pyrolysis and Bunsen burner. The determination was done by observing the variation of relative band and relative concentration, and they were also suitable for estimating ET and P contents of the same rubber.

TLC/IR using UATR accessory was applied for characterization of additives, in order to evaluate the applicability of these techniques together. Two formulations were used in this elastomer – a type of eluent system and the Gibbs reagent, the developer. Basically, all organic components were detected by this methodology that showed to be promising for detecting additives of similar chemical structures, though small quantities of some components presented in the formulation (Damazio . 2016Damazio DB,3 descartáveis Ply máscara facial não tecidos para Adulto, Diniz MFD,Multicolor ardósia do painel de parede para decoração, Dutra RCL (2016) TLC/IR (UATR) off-line coupling for the characterization of additives in EPDM rubber compositions. Polímeros. In press.).

Lanxess Rubber (2012)Lanxess Rubber (2012) Catalogo técnico – determinação do conteúdo de eteno, ENB e VNB no EP(D)M.developed on an industrial laboratory a methodology for determining the ET, ENB and 2-vinyl norbornene (VNB) content in EPDM, but only applied to EPDM rubber which does not have a plasticizer. For extended rubber, oil extraction must be made in advance, because plasticizer interferes with proper execution of the analysis. It may take more time for the process to be finished.

Another method (ASTM D3900 – 05a 2010) for the determination in question uses EPDM samples with ET content (35 – 85%) established by nuclear magnetic resonance of carbon 13 (13C NMR) and analyzed by FT-IR transmission. Samples were prepared as films without plasticizer. Four methods have been established as well as the analytical bands (cm-1) of P and ET used, being on the relative band (P/ET): 1156/722; 1379/722; 1379/1460; 1156/4255 (by using band in NIR region for ET, which, although, did not found the assignment in the text, being a combination of bands at the same region). Some interference in determining proper baseline was cited due the presence of additive bands around 1156 cm-1of P, recommending the use of other bands.Lanxess Rubber (2012)Lanxess Rubber (2012) Catalogo técnico – determinação do conteúdo de eteno, ENB e VNB no EP(D)M.obtained spectra by transmission mode, but details of sample preparation, number of replications and error methodology are not mentioned.

The methodology was fairly detailed on ASTM standard (ASTM D3900 – 05a 2010), but some points should be highlighted: (a) pressed samples are not suitable for vulcanized materials; (b) the presence of additives in one of the methods interferes in the choice of baseline, implying the use of other bands; (c) the use of a non-selective band of ethylene (1460 cm-1), which is attributed to the CH2and CH3angular deformation, indicating that the best analytical bands would be found at 1379 cm-1to P and 722 cm-1to ET.

Recent study (Chitta 2014Chitta R (2014) Development of high temperature liquid chromatography for chemical composition separation of polyolefins (PhD thesis). Darmstadt: Technischen Universität Darmstadt.) applied HPLC to separate EPDM terpolymers based on diene content. It was found that the nature of diene contributes with the retention. According to the author, the difference between the elution volume obtained experimentally from an EPDM sample and the expected elution volume of an EP sample, with identical ethylene content, contributes to calculate the diene content of EPDM. HPLC analysis of polymers is a prerequisite to determine solubility of macromolecules in the corresponding sample solvent or mobile phase, at a specific temperature.Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis proteção para o Anti virus venda.Damazio (2015)Damazio DB,Para o filtro da porta de fábrica 3Máscara descartável Iir ply, Diniz MF,Pt149 Non-Mdical Boa máscara de respiração isqueiros 3camadas protetoras Non-Woven Máscara facial para venda, EC, Dutra RCL (2015) Determinação do teor de ENB em EPDM (elastômero puro) por FT-IR de transmissão, por meio de banda relativa. Polímeros 25(2):181-185. doi: 10.1590/0104-1428.1777
Alto brilho moderno despensa Armário armário de cozinha móveis armazenamento simples definir
developed a quantitative analysis. As HPLC analysis conditions are more complex than other techniques, TLC/IR can be used for separation and identification of additives.

TG and IR Methods for Characterization of Rubbers and Their Additives

The main methodologies that have been developed for additives analysis generally involve solvent extraction step, increasing analysis time.Sanches (2015)Sanches NB, Cassu SN, Dutra RCL (2015) TG/FT-IR characterization of additives typically employed in EPDM formulations. Polímeros 25(3):247-255. doi: 10.1590/0104-1428.1819
Luz do Separador de impurezas
investigated unvulcanized and vulcanized EPDM and their additives by FT-IR analysis of gaseous pyrolysates (PIR-G/FT-IR) (Sanches . 2014Sanches NB, Cassu SN, Diniz MF, Dutra RCL (2014) Characterization of additives typically employed in EPDM formulations by using FT-IR of gaseous pyrolyzates. Polímeros 24(3):269-275. doi: 10.4322/polimeros.2014.066
Placa de Circuitos PCB camadas único produto personalizado
) and by thermogravimetric analysis coupled with FT-IR (TG/FT-IR) (Sanches . 2015Sanches NB, Cassu SN, Dutra RCL (2015) TG/FT-IR characterization of additives typically employed in EPDM formulations. Polímeros 25(3):247-255. doi: 10.1590/0104-1428.1819
Sublimação Foto revestida a pedra ardósia
), both without solvent extraction step. A comparison between these two methodologies was also carried out. The results showed that functional groups of additives can be detected from unvulcanized and vulcanized rubbers, without prior extraction. The sulfur additives, monossulfide of tetrametil tiuram (TMTM) and 2-mercaptobenzothiazole (MBT), at levels as low as 0.7 phr (0.63 wt %), were detected by both methods. However, other additives such as paraffin oil, stearic acid and 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ) can not be identified by these methodologies. Individually, all analyzed additives presented distinct FT-IR spectra and were also identified from each other by coupled PIR-G/FT-IR and TG/FT-IR methodologies.

Sanches . (2006)Sanches NB, Diniz MF, Reis TB, Cassu SN, Dutra RCL (2006) Avaliação do uso de técnicas PIR-G/FT-IR para caracterização de elastômeros. Polímeros 16(3):211-216. doi: 10.1590/S0104-14282006000300010
Natureza antiderrapagem ardósia Sala de lavagem para casa banho em mosaico e Design Piscina
used PIR-G/FT-IR technique for investigating gaseous products of other rubbers. The developed methodology was suitable to identify different elastomers and elastomer blends, including rubbers that present similar IR spectra of pyrolyzed liquid products, such as halogenated forms of copolymer of isobutylene and isoprene rubber (CIIR and BIIR), natural and copolymer of butadiene and styrene rubber (NR/SBR) as well as EPDM/SBR, SBR and butadiene rubber (SBR/BR) and SBR.

Arockiasamy . (2012)Arockiasamy A, Toghiani H, Oglesby D, Horstemeyer MF, Bouvard JL, King RL (2012) TG-DSC-FTIR-2021 novo grau de Máscara-butadiene rubber. J Therm Anal Colorim 111(1):535-542. doi: 10.1007/s10973-012-2559-0
Mobile Salas Frias para frutas e verduras frescas Sala Fria frigorífico congelador
studied the decomposition behaviour of SBR using a system equipped with TG, DSC, FT-IR and mass spectroscopy (MS).3máscara descartável de protecção Earloop ply. FT-IR detected the presence of the following functional groups: OH, C–H and C=C, C=O and O–C–O. The interaction of these techniques proved to be useful for this kind of characterization.

Sanches . (2015)Sanches NB (2015) Caracterização de proteções térmicas de EPDM por PIR-G/FT-IR e TG/FT-IR (PhD thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.developed a methodology of TG/IR in order to evaluate additives in EPDM rubber composition. Unvulcanized and vulcanized EPDM rubbers and their additives were investigated by TG/FT-IR without solvent extraction and in a wide temperature range. TG/FT-IR detected absorptions due to the additives tetramethylthiuram monosulfide and 2-mercaptobenzothiazole present in the EPDM formulation at concentrations of 0.7 phr (0.63 wt %). Paraffin oil, stearic acid and 2,2,4-trimethyl-1,2-dihydroquinoline functional groups were not observed in either the unvulcanized or vulcanized EPDM. Nevertheless, in addition to the ability of this method to detect sulfur-containing groups, the lack of a pre-extraction reduces the time and effort required for additive analysis in rubbers. Therefore, the TG/FT-IR technique can be employed for analyzing additives separately, neat rubber (raw), vulcanized and unvulcanized compounds. Additives degradation can also be investigated by TG/FT-IR, because of the temperature selectivity.

FT-IR Surface Analysis of EPDM Rubber

Elastomers of the ethylene-propylene, such as EPDM, are apolar and present low adhesion properties, in most cases, requiring surface treatment. Plasma surface treatments have been an alternative to improve these characteristics, besides being harmless to the environment.

Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial com bom preço-IR to characterize chemical species formed on surface as a consequence of the treatment. Some studies in which plasmas were used to treat EPDM rubbers also showed a good response and sensitivity by using some FT-IR techniques to analyze their surfaces (Moraes . 2007Moraes JH, da Silva Sobrinho AS, Maciel HS, Dutra JCN, Massi M, Mello SAC, Schreiner WH (2007) Surface improvement of EPDM rubber by plasma treatment. J Phys D Appl Phys 40(24):7747-7748. doi: 10.1088/0022-3727/40/24/022
Cultura em mármore branco Carrara revestimento de paredes pedra
;Grythe and Hansen 2006Grythe KF, Hansen FK (2006) Surface modification of EPDM rubber by plasma treatment. Langmuir 22(14):6109-6124. doi: 10.1021/la053471d
Aço pintado/bobina de aço galvanizado/bobina galvanizado folha/Galvalume bobinas aço/Bobinas alumínio/PPGI/Gi/PPGL/GL
;Awaja . 2009Awaja F, Gilbert M, Kelly G (2009) Adhesion of polymers. Prog Polym Sci 34(9):948-968.). Spectra of EPDM and polyolefin treated by plasmas were obtained with ATR, but UATR, the new generation of the FT-IR technique, has not been used to study polymer surfaces.

Isqueiros 3 camadas de máscara para Adulto Non-Wonven Valor Respiração Máscara(2013)Máscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Multicolor ardósia do painel de parede para decoração, Diniz MF, Dutra RCL (2013) Study by FT-IR technique and adhesive properties of vulcanized EPDM modified with plasma.Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis proteção para o Anti virus/Wind/Poeira(1):65-74. doi: 10.5028/jatm.v5i1.163
Pedra ardósia Ledger-Rustic Multicolor
modified the surface of vulcanized EPDM, Nordel IP 3430 and Nordel IP 4520 with plasma excited by microwaves in Ar, N2, Ar/O2, N2/O2, N2/H2and N2/H2/Ar, aiming the improvement of their adhesive properties. The characterization was made by FT-IR techniques of reflection: UATR, MIC with ATR objective and PAS (Isqueiros 3 camadas de máscara para Adulto Non-Wonven Valor Respiração Máscara. 2012bMáscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Qualidade superior Kutehealth 3ply Máscara 2021 Melt-Blown grossista máscara descartável, Diniz MF, Dutra RCL (2012b) Caracterização por FT-IR da superfície de borracha EPDM tratada via plasma por micro-ondas. Polímeros 22(5):440-446. doi: 10.1590/S0104-14282012005000065
Amarelo irregulares de ardósia lajes para pavimentos
,2013Hotsale Piscina Home Sala de madeira vime Pierre Jeanneret Presidente(2013) Estudo por meio de técnicas FT-IR e de propriedades adesivas da borracha de EPDM vulcanizada e modificada por plasma (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.,2014Máscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Multicolor ardósia do painel de parede para decoração, Diniz MF, Dutra RCL (2014). Técnicas FT-IR (PAS, UATR e objetiva ATR) aplicadas à caracterização de EPDM modificada com plasma. Polímeros 24(3):411-416. doi: 10.4322/polimeros.2014.015
3 Folhas descartáveis máscaras faciais
). They were used to evaluate the degrees of different sampling depth for the characterization of rubbers after plasma treatments,O algodão 3 Ply Máscara facial descartável para respiração confortáveis equipamentos de segurança(oxygen and nitrogen) chosen to form gaseous mixtures. UATR technique was the most suitable for this purpose, because it showed less interference with the components of the rubber formulation, detecting spectrometric changes arising from the formation of polar groups promoted by the plasma treatment. In order to validate the results obtained by FT-IR, X-ray photoelectron spectroscopy (XPS) analysis was performed before and after treatment, and it was observed an increase in the percentage of atomic oxygenated and nitrogenated groups on the surface after treatments by Ar/O2plasma and N2/H2, confirming the results found by FT-IR. It was observed a reduction in the values of the contact angle, high values of work of adhesion and peel strength test of adhesive gasket (EPDM/Adhesive PU/PVC). These results were attributed to the improvement in adhesive properties of treated surface. After Ar/O2, N2/H2and N2/H2/Ar plasma treatments, Nordel IP 4520 rubber showed fairly aging stability, evaluated by measuring contact angle. Nordel IP 3430 achieved its best result just with Ar/O2plasma. Samples submitted to mechanical tests were characterized by FT-IR/UATR, and bond failures were confirmed between the interface of the adhesive film of PU and EPDM (Nordel IP 3430) rubber, noticing the contribution of this technique for studying interfaces.

A recent study (Pistor and Zattera 2014Pistor V, Zattera AJ (2014) Degradation kinetics of ethylene propylene diene terpolymer residues devulcanized by microwaves. J Elastomers Plast 46(1):69-83. doi: 10.1177/0095244312462159
Caso os móveis Cadeira de ouro com couro PU
) about reclaiming of elastomer residues has used instrumental techniques for characterization of devulcanization caused by microwaves exposure. The efficiency of devulcanization of EPDM was determined by subjecting the elastomer samples to 2, 3 and 4 min of microwaves exposure. Scanning electron microscopy (SEM) and TG using different heating rates were used to determine the kinetic degradation parameters according to the Flynn-Wall-Ozawa method. It was observed that, up to 4 min of devulcanization exposure period, the degradation temperature of EPDM was not exceeded. Microwaves exposure delivered a maximum devulcanization temperature range that is consistent with the degradation temperatures observed by TG. The morphology of the samples was altered by the microwave treatment. The devulcanization process favored particle size reduction, while additionally increasing the particles surface roughness after the devulcanization process. Activation energy values were also reduced as a result of the change in morphology, probably due to the diminished concentration in polysulfide links characteristic of the vulcanized EPDM-r 3-D network.

FT-IR ANALYSIS OF COMPOSITE SYSTEMS

Epoxy systems (ES) are very important due their versatility and potential of use,Preço grossista fabricante KN95 N95 FFP2 Protecção descartável respirador máscara facial de segurança. Depending on the physical and chemical properties of the curing agents (CA) and the process conditions, it is possible to vary significantly the properties of the final material, such as mechanical strength, thermal and chemical resistance etc. Therefore, the mechanism of cure must be known in order to establish the relationship between structure and properties of the material, optimizing how it will be used, i.e. adhesive, coating or matrix composites. Thus, it is evident the importance of characterization and identification of curing agents in ES.

Romão (2003)Romão BMV (2003) Caracterização e avaliação de sistemas epoxídicos utilizados na indústria aeroespacial (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.studied ES based on diglycidyl ether of bisphenol A (DGEBA) cured with nine CA. The characterization of these ES and CA was done by DSC, FT-IR, TG and coupling TG/FT-IR. The curing conditions of ES were determined by DSC.Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis Máscara protecção. The ES decomposition temperature determined by TG was used for identifying the respective CA by controlled pyrolysis FT-IR (CONTROLPIR/FT-IR).

A recent study (Ahamad and Alshehri 2014Ahamad T, Alshehri SM (2014) Thermal degradation and evolved gas analysis: a polymeric blend of urea formaldehyde (UF) and epoxy (DGEBA) resin. Arabian J Chem 7:1140-1147. doi: 10.1016/j.arabjc.2013.04.013
Usando material poliéster Tecidos de pulseiras band a
), including epoxy resin and coupled methodologies for its characterization, was found. A polymeric blend has been prepared using urea formaldehyde (UF) and epoxy resin (DGEBA) in 1:1 mass ratio. TG coupled with FT-IR and spectrometric mass (MS) technique were used to study the thermal degradation of UF/epoxy resin blend (UFE). The TG results showed the pyrolysis process divided into three stages: drying process, fast thermal decomposition and cracking of the sample.Nova sala de jantar metal moderno mobiliário cadeira para hotel. Volatile products, such as CO2, CO, H2O, HCN, HNCO, and NH3,Canto de metal moderno jardim Sofá Jardim Mobiliário exterior. These two techniques could be complementary since they were refined to identify more precisely evolved gases.

Future trends

There are new studies being carried out in different areas, such as polymers systems for hybrid propulsion (Isqueiros 3 camadas de máscara para Adulto Non-Wonven Valor Respiração Máscara. 2012aNovo Evento Mobiliário Comercial Cadeira Banquete de Aço Inoxidável, Pedreira SM, Lacava PT (2012a) Physical property and carbon black distribution impact on propulsion efficiency of paraffin-based fuel. Proceedings of the ASME International Mechanical Engineering Congress and Exposition, volume 1; Houston, USA.), FT-IR characterization of polymers used in microencapsulation of oxidizer for propellants (Oliveira 2014Oliveira JIS, Sciamareli J, Diniz MF, Dutra RCL (2014) Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP. Polímeros 24(5):620-627. doi: 10.1590/0104-1428.154
Teste de Kraft 1880mm 70toneladas 150gsm Papel para máquina fabricação
) and substitution of asbestos in polymers thermal insulation compositions.

In recent publications found in literature about these subjects, we can cite the “Bar&contra banco giratório” (Chen and Gao 2014Chen J, Gao X (2014)Kvj-6002 Vintage estilo francês restaurante Cruz empilháveis volta cadeira de madeira. Journal of Polymer and Biopolymer Physics Chemistry 2(4):78-83. doi: 10.12691/jpbpc-2-4-4
Fabricado na China en149 Non-Mdical Boa máscara de respiração /Medicaldisposable Non-Woven facial 3 camadas para Earloop Anti virus/Wind/Poeira sua saúde
), which emphasizes properties of potential polymeric fuels and their modification.

Novozhilov et al. (2011)Novozhilov V, Joseph P, Ishiko K, Shimada T, Wang H, Liu J (2011) Polymer combustion as a basis for hybrid propulsion:Evento de casamento Carro Luxury Metal Estrutura Ouro Velvet Lounge Lazer poltrona. Energies 4(10):1779-1839. doi: 10.3390/en4101779
200mm Placa Giratória Pesado de borracha preta Castor
,Elegante forma Z PU Couro Cadeira de jantar, cites that hybrid propulsion is an attractive alternative to conventional liquid and solid rocket motors, which has been an active area of research and technological developments. Fundamental flammability characteristics of polymeric fuels have been discussed. Success of polymer fuel applications to hybrid propulsion depends on further improvement of their combustion characteristics, by the enhancement of regression rates. Estimates suggest that the regression rate needs to be increased dramatically, but chemical fuel modification is a promising route to overcome this bottleneck.

Santhosh (2010)Santhosh G (2010) Coating and burn-rate studies of ammonium dinitramide (ADN). Chapter 7; p. 228-239. Prepared by Beehive Digital Concepts Cochin for Mahatma Gandhi University Kottayam.discussed about the use of ethyl cellulose (EC) and poly(methyl methacrylate) (PMMA) as coating materials of spherical grains of ADN. A comparison of the moisture absorption profiles of ADN coated with EC and PMMA was made. Preliminary coating studies on spherical ADN grains were carried out using EC and PMMA at relative humidity of 62 and 74%. ADN coated with PMMA showed better properties than EC. The moisture pickup was reduced over 50% for the ADN grains coated with either EC or PMMA.

Virta (2005)Virta RL (2005) Asbestos substitutes; [accessed 2016 Jan 06]. http://www.segemar.gov.ar/bibliotecaintemin/LIBROSDIGITALES/Industrialminerals&rocks7ed/pdffiles/papers/090
Máscara de pó máscara descartável Protetor Facial grossista Máscaras Pano Non-Woven da facial carbono activado forma personalizada
noticed a considerable decline consumption of asbestos in the United States, part of Europe and some other countries. In fact, many asbestos substitutes have been successful used for a long time, being an integral part of the product. Asbestos still have been used in some places; however, it is observed a considerable expansion in sales of substitutes or alternative materials.

In this context,Maxim . (2014)Maxim LD, Ron Niebo R, McConnell EE (2014)Aparelhos respiratórios de oxigénio experientes a válvula do circuito respiração plástico da filtro. Inhal Toxicol 26(5):259-270. doi: 10.3109/08958378.2014.881940
Ecrã táctil de fábrica POS Android o preço do sistema
Derrubar Projetar Crystal Clear Transparente Chiavari presidir ao evento de casamento, being used as asbestos substitute. They concluded that the available data are not reliable to use for risk calculations of perlite-exposed populations and warn that perlite is regulated as a nuisance dust in some countries.

According to future trends, characterization of these polymer/energetic materials, based on FT-IR and other complementary techniques,Restaurante exterior leve em alumínio de madeira Café Industrial Banquetes Cadeira jantar .

CONCLUSIONS

Banquetes Louis cadeiras brancas de madeira/energetic materials.30 em fezes de Metal Industrial Backless banquetas tipo bar Indoor-Outdoor Switches empilháveis/energetic materials can be considered a dynamic process presenting new challenges for the future. Many developments have been made in recent years towards this goal. Characterization schemes help to provide researchers with a wide variety of analytical techniques. It was realized that there is a small number of FT-IR studies on the NIR region, coupling techniques application,Estilo de luxo luz mesa jantar popular . Thus, studies that have been developed in this area can contribute for the increase in technical and scientific research of these materials.

ACKNOWLEDGEMENTS

This study was supported in part by the National Senior Visiting Professor Program (PVNS) from the Coordination for the Improvement of Higher Education Personnel (CAPES) and the São Paulo Research Foundation (FAPESP) (grant #2014/00560-9).

REFERENCES

  • Ahamad T, Alshehri SM (2014) Thermal degradation and evolved gas analysis: a polymeric blend of urea formaldehyde (UF) and epoxy (DGEBA) resin. Arabian J Chem 7:1140-1147. doi: 10.1016/j.arabjc.2013.04.013
    O Pó com Válvula de Alta Qualidade/respirador névoa óleo
  • American Society for Testing and Materials (ASTM) D3900 – 05a (2010) Determination of Ethylene Units in Ethylene-Propylene Copolymers (EPM) and in Ethylene-Propylene-Diene Terpolymers (EPDM) by Infrared Spectrometry, Annual Book of ASTM Standards, Philadelphia.
  • Arockiasamy A, Toghiani H, Oglesby D, Horstemeyer MF, Bouvard JL, King RL (2012) TG-DSC-FTIR-2021 novo grau de Máscara-butadiene rubber. J Therm Anal Colorim 111(1):535-542. doi: 10.1007/s10973-012-2559-0
    De HDPE cadeira dobrável de Aço Alta Qualidade Cadeira convenientes para exterior
  • Awaja F, Gilbert M, Kelly G (2009) Adhesion of polymers. Prog Polym Sci 34(9):948-968.
  • Chen J, Gao X (2014)Kvj-6002 Vintage estilo francês restaurante Cruz empilháveis volta cadeira de madeira. Journal of Polymer and Biopolymer Physics Chemistry 2(4):78-83. doi: 10.12691/jpbpc-2-4-4
    Pedra natural amarelo/verde/cinza/preto/rústica de ardósia quartzito para pavimentação/Piso/revestimento paredes
  • Chitta R (2014) Development of high temperature liquid chromatography for chemical composition separation of polyolefins (PhD thesis). Darmstadt: Technischen Universität Darmstadt.
  • Clemente M, Rocha RJ, Iha K, Rocco JAFF (2014) Desenvolvimento de tecnologia de pré-polímeros na síntese de poliuretanos empregados em combustíveis sólidos. Quím Nova 37(6):982-988. doi: 10.5935/0100-4042.20140154
    Barato Rusty ardósia pisos de mosaico// parede pedra Pavimentação
  • Damazio DB (2015) Caracterização por FT-IR e TLC de EPDM (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.
  • Damazio DB,3 descartáveis Ply máscara facial não tecidos para Adulto, Diniz MFD,Multicolor ardósia do painel de parede para decoração, Dutra RCL (2016) TLC/IR (UATR) off-line coupling for the characterization of additives in EPDM rubber compositions. Polímeros. In press.
  • Damazio DB, Diniz MF,Multicolor ardósia do painel de parede para decoração, Dutra RCL (2014) Determinação por FT-IR de transmissão e reflexão (UATR) de etileno e propileno em EPDM. Polímeros 24(6):703-710. doi: 10.1590/0104-1428.1536
    Mini-filhos equilíbrio do balanço banco regulável de segurança bicicletas Bike
  • Damazio DB,Para o filtro da porta de fábrica 3Máscara descartável Iir ply, Diniz MF,Pt149 Non-Mdical Boa máscara de respiração isqueiros 3camadas protetoras Non-Woven Máscara facial para venda, EC, Dutra RCL (2015) Determinação do teor de ENB em EPDM (elastômero puro) por FT-IR de transmissão, por meio de banda relativa. Polímeros 25(2):181-185. doi: 10.1590/0104-1428.1777
    Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis protetora para venda Anti virus
  • Dutra RCL (1996) Aplicação de técnica TLC-IR em estudos de separação, identificação e quantificação de aditivos em borrachas. Polímeros 6(2):26-31.
  • Grythe KF, Hansen FK (2006) Surface modification of EPDM rubber by plasma treatment. Langmuir 22(14):6109-6124. doi: 10.1021/la053471d
    De Ardósia natural de ardósia irregulares Net Bandeira Mosaico pedra para pavimentação Jardim
  • Kawamoto AM, Barbieri U, Keicher, T, Krause H, Holanda JAS, Kaiser M, Polacco G (2008) Synthesis and characterization of glycidyl azide-r(3,3-bis(azidomethyl) oxetane) copolymers. Propellants Explos Pyrotech 33(5):365-372. doi: 10.1002/prep.200700221
    Pedra natural barato enferrujado azulejos de ardósia para pavimentos
  • Kawamoto AM, Diniz MF, Lourenço VL, Takahashi MFK, Keicher T, Krause H, Menke K, Kempa PB (2010) Synthesis and characterization of GAP/BAMO copolymers applied at high energetic composite propellants.10ton Cultura Papel de cópia A4 máquina fazer toda a linha produção papel(3):307-322. doi: 10.5028/jatm.2010.02037910
    Descartáveis para uso adulto Non-Woven Máscara de impressão moda o pó descartável e respirável em três camadas tecido Personalizado Prot
  • Kawamoto AM, Oliveira JIS, Dutra RCL, Rezende LC, Keicher T, Krause H (2009) Synthesis and characterization of energetic thermoplastic elastomers for propellant formulations.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(1):35-42. doi: 10.5028/jatm.2009.01013542
    Venda por grosso de resina epóxi para madeira
  • Lanxess Rubber (2012) Catalogo técnico – determinação do conteúdo de eteno, ENB e VNB no EP(D)M.
  • Lourenço VL, Kawamoto AM, Sciamareli J, Rezende LC, Pires DC, Takahashi MFK, Berdugo AV, Cruz SM, Dutra RCL, Soares BG (2006) Determinação da distribuição de funcionalidade de HTPB e verificação de sua influência no comportamento mecânico de poliuretano utilizado em motor-foguete. Polímeros 16(1):66-70.
  • Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Dutra RCL, Iha K (2004a). Avaliação do uso de técnicas FT-IR para caracterização de cobertura polimérica de material energético. Polímeros 14(2):63-68. doi: 10.1590/S010414282004000200007
    Venda por grosso de Máscara máscara descartável aptos para escritórios casas animais estimação e áreas movimentadas com elástico brinco
  • Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Nakamura NM, Dutra RCL (2009) Determination of polymer content in energetic materials by FT-IR.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(2):167-175. doi: 10.5028/jatm.2009.0102167175
    Pedra natural peitoril de ardósia painéis pedra para revestimento paredes
  • Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Diniz MF, Viganó I, Iha K, Dutra RCL (2004b) Application of FT-IR techniques for identification of different polymers used in the coating process of energetic materials. Proceedings of the International Annual Conference of the Fraunhofer ICT, 147; Karlsruhe, Germany
  • Piso em mosaico de ardósia cinza para pisos e revestimento paredes, Moreira ED, Diniz MF, Dutra RCL, Silva G, Iha K, Teipel U (2008) Characterization of polymer-coated RDX and HMX particles. Propellants Explos Pyrotech 33(1): 44-50. doi: 10.1002/ prep.200800207
    Novo design do mobiliário de cozinha rápida montagem armário multifuncional Metal
  • Maxim LD, Ron Niebo R, McConnell EE (2014)Aparelhos respiratórios de oxigénio experientes a válvula do circuito respiração plástico da filtro. Inhal Toxicol 26(5):259-270. doi: 10.3109/08958378.2014.881940
    Estrutura de formação para fazer o papel impressão
  • Moraes JH, da Silva Sobrinho AS, Maciel HS, Dutra JCN, Massi M, Mello SAC, Schreiner WH (2007) Surface improvement of EPDM rubber by plasma treatment. J Phys D Appl Phys 40(24):7747-7748. doi: 10.1088/0022-3727/40/24/022
    Soft cortar o cabelo da cabeça do bebé SPA Band a para lavar roupa de banho
  • Novozhilov V, Joseph P, Ishiko K, Shimada T, Wang H, Liu J (2011) Polymer combustion as a basis for hybrid propulsion:Evento de casamento Carro Luxury Metal Estrutura Ouro Velvet Lounge Lazer poltrona. Energies 4(10):1779-1839. doi: 10.3390/en4101779
    Válvula plástica da exalação do respiradouro dispositivo inalação para o respirador
  • Oliveira JIS (2014). Síntese e caracterização do oxidante ADN (dinitramida de amônio), usado em propelentes para aplicação aeroespacial (PhD thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.
  • Oliveira JIS, Diniz MF, Kawamoto AM, Dutra RCL, Keicher T (2006) MIR/NIR/FIR characterization of poly-AMMO and poly-BAMO and their precursors as energetic binders to be used in solid propellants. Propellants Explos Pyrotech 31(5):395-400. doi: 10.1002/prep.200600054
    Quadro de piso ardósia cor ferrugem para banho cozinha
  • Oliveira JIS, Dutra RCL, Diniz MF, Kawamoto AM, Keicher T (2007) Determination of CHN content in energetic binder by MIR analysis. Polímeros 17(1):43-47. doi: 10.1590/S0104-14282007000100011
    Red PU Serviço Pesado Dianteiras
  • Oliveira JIS, Sciamareli J, Diniz MF, Dutra RCL (2014) Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP. Polímeros 24(5):620-627. doi: 10.1590/0104-1428.154
    Suprimento médico melhor Venda 3 Ply Earloop Fabricante de máscara facial descartável
  • Pistor V, Zattera AJ (2014) Degradation kinetics of ethylene propylene diene terpolymer residues devulcanized by microwaves. J Elastomers Plast 46(1):69-83. doi: 10.1177/0095244312462159
    China Metal microfusão Cera Perdida Broca do sem-fim
  • Ribeiro SP, Santiago DG, Vianna Jr AS (2012) Poli (Metil Azoteto de Glicidila) – GAP. I. Síntese e caracterização. Polímeros 22(5):407-413. doi: 10.1590/S0104-14282012005000045
    Respirador Non-Woven preto Máscara de protecção segurança com Válvulas
  • Romão BMV (2003) Caracterização e avaliação de sistemas epoxídicos utilizados na indústria aeroespacial (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.
  • Sanches NB (2015) Caracterização de proteções térmicas de EPDM por PIR-G/FT-IR e TG/FT-IR (PhD thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.
  • Sanches NB, Cassu SN, Diniz MF, Dutra RCL (2014) Characterization of additives typically employed in EPDM formulations by using FT-IR of gaseous pyrolyzates. Polímeros 24(3):269-275. doi: 10.4322/polimeros.2014.066
    Protecção da Saúde Nanofiber KN95 Sopro Industrial Respirador Completo
  • Sanches NB, Cassu SN, Dutra RCL (2015) TG/FT-IR characterization of additives typically employed in EPDM formulations. Polímeros 25(3):247-255. doi: 10.1590/0104-1428.1819
    Dlpo PP de Serviço Pesado com rodas giratórias dianteiras para carrinho mão carrinhos
  • Sanches NB, Diniz MF, Reis TB, Cassu SN, Dutra RCL (2006) Avaliação do uso de técnicas PIR-G/FT-IR para caracterização de elastômeros. Polímeros 16(3):211-216. doi: 10.1590/S0104-14282006000300010
    3 Ply Designers de protecção Mask elevada filtração Mascarillas e fácil Sopro Custom Preto descartáveis Máscara
  • Santhosh G (2010) Coating and burn-rate studies of ammonium dinitramide (ADN). Chapter 7; p. 228-239. Prepared by Beehive Digital Concepts Cochin for Mahatma Gandhi University Kottayam.
  • Novo Evento Mobiliário Comercial Cadeira Banquete de Aço Inoxidável, Pedreira SM, Lacava PT (2012a) Physical property and carbon black distribution impact on propulsion efficiency of paraffin-based fuel. Proceedings of the ASME International Mechanical Engineering Congress and Exposition, volume 1; Houston, USA.
  • Hotsale Piscina Home Sala de madeira vime Pierre Jeanneret Presidente(2013) Estudo por meio de técnicas FT-IR e de propriedades adesivas da borracha de EPDM vulcanizada e modificada por plasma (master’s thesis). São Paulo: Instituto Tecnológico de Aeronáutica. In portuguese.
  • Máscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Qualidade superior Kutehealth 3ply Máscara 2021 Melt-Blown grossista máscara descartável, Diniz MF, Dutra RCL (2012b) Caracterização por FT-IR da superfície de borracha EPDM tratada via plasma por micro-ondas. Polímeros 22(5):440-446. doi: 10.1590/S0104-14282012005000065
    A logística do Vinho serviço de transporte a partir Espanha para China
  • Máscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Multicolor ardósia do painel de parede para decoração, Diniz MF, Dutra RCL (2013) Study by FT-IR technique and adhesive properties of vulcanized EPDM modified with plasma.Pt149 Non-Mdical Boa máscara de respiração 3sulcar Non-Woven descartáveis proteção para o Anti virus/Wind/Poeira(1):65-74. doi: 10.5028/jatm.v5i1.163
    1575mm resíduos do tipo de planta reciclagem papel escrita para capacidade 10 toneladas/dia
  • Máscaras de máscara facial descartável Earloop Valor Respiração Filtro 95% 5Máscara ply,Pt149 Non-Mdical Boa máscara de respiração em stock 3Descartáveis Non-Woven ply Azul/Branco Máscara facial Foe toda a venda Anti virus,Multicolor ardósia do painel de parede para decoração, Diniz MF, Dutra RCL (2014). Técnicas FT-IR (PAS, UATR e objetiva ATR) aplicadas à caracterização de EPDM modificada com plasma. Polímeros 24(3):411-416. doi: 10.4322/polimeros.2014.015
    Comercial MDF moderno apartamento de madeira armário cozinha
  • Sciamareli J, Costa JR, Takahashi MFK, Diniz MF, Lourenço VL, David LH, Iha K, Miyano MH, Ferreira C (2009a) Síntese e caracterização do polímero energético metil azoteto de glicidila (GAP) via análises instrumentais. Polímeros 19(2):1-4. doi: 10.1590/S0104-14282009000200008
    Impressão por sublimação de ardósia decoração em pedra fotografias a partir rochas Transferência Calor Sunmeta
  • Sciamareli J, Costa JR, Takahashi MFK, Iha K, Berdugo AAV, Diniz MF, Miyano MH, Ferreira C (2009b) Otimização do processo de obtenção do pré-polímero metil azoteto de glicidila.Granito Natural Pavimento/Mesa/Metro Cúbico Ardósia Pedra de calçada/ Espalhadoras pedra para paisagismo(1):29-34. doi: 10.5028/jatm.2009.01012934
    A integração do comércio Living jantar moderna sala de bambu Presidente
  • Takahashi MFK, Dutra RCL, Diniz MF, Polito WL (1996) Determinação de índices de hidroxila em polibutadienos hidroxilados e de grupos NCO em diisocianatos e pré-polímeros por espectroscopia no infravermelho com transformada de Fourier. Polímeros 6(4):45-52.
  • Tourné M (2013) Developments in explosives characterization and detection. J Forensic Res S12:1-10. doi: 10.4172/2157-7145.S12-002
    Conector BNC de RF Antena bujão macho reto
  • Virta RL (2005) Asbestos substitutes; [accessed 2016 Jan 06]. http://www.segemar.gov.ar/bibliotecaintemin/LIBROSDIGITALES/Industrialminerals&rocks7ed/pdffiles/papers/090
    Pt149 Non-Mdical Boa máscara de respiração Medicalwhole Venda Non-Woven Máscara 3 Ply Azul2

Publication Dates

  • Publication in this collection
    Jan-Mar 2016

History

  • Received
    2021-06-05
  • Accepted
    2021-06-05
Poilsh tubo redondo soldadas de aço inoxidável ASTM 304 316L 310S
Departamento de Ciência e Tecnologia AeroespacialSawa Hot-Selling cadeiras em aço inoxidável de assento couro para o evento banquete núpcias. Praça Marechal do Ar Eduardo Gomes, 50. Vila das Acácias, CEP: 12 228-901, tel (55) 12 99162 5609 -Rosa moderna Velvet rodada de volta Dior em aço inoxidável Casamento Cadeira jantar- SP -Meados do século XIX Pernas de madeira maciça moderno Cadeira jantar veludo
E-mail:secretary@jatm.com.br
Serviço de Transporte Iumpsum da China para Angola