Search Results - "Rita C.L. Dutra"
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Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data
Published in Anais da Academia Brasileira de Ciências (01-01-2022)“…Abstract Silica is a versatile material employed in different applications fields including aerospace, especially for rocket engines thermal protections. It is…”
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The role of organoclay in the diffusion of epoxy‐amine oligomers and in the cross‐linking density of the resulting network
Published in Journal of applied polymer science (05-03-2023)“…Epoxy nanocomposites are promising for adhesive applications due to their high performance. In this work, an organoclay (PO), prepared by cationic exchanging…”
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3
Characterization of the curing agents used in epoxy resins with TG/FT-IR technique
Published in Polímeros, ciência e tecnologia (01-06-2006)“…Samples of epoxy resin (EP) based on the diglycidyl ether of bisphenol A (DGEBA), cured with nadic methyl anhydride (NMA) and mercaptan (CAPCURE 3-800), or…”
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4
Performance analysis of injectors for a hybrid propulsion system
Published in Journal of the Brazilian Society of Mechanical Sciences and Engineering (2019)“…This paper presents a study about injectors, where the radial injector was evaluated. This type of injector was chosen because only a small amount of…”
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Determination of Primary Amine Content in Bonding Agent Used in Composite Solid Propellants
Published in Propellants, explosives, pyrotechnics (01-08-2014)“…The primary amine content in tetraethylenepentamine (TEPA) and TEPAN, a bonding agent used in composite solid propellants, was determined by near infrared…”
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Characterization of Polymer-Coated RDX and HMX Particles
Published in Propellants, explosives, pyrotechnics (01-02-2008)“…Fourier transform‐infrared spectroscopy (FT‐IR) in transmission and photoacoustic detection (PAS) techniques have been used for the characterization of…”
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Determination of the HMX and RDX content in synthesized energetic material by HPLC, FT-MIR, and FT-NIR spectroscopies
Published in Química nova (01-08-2004)“…A new method has been developed for determining the content of mixtures of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and…”
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MIR/NIR/FIR Characterization of Poly-AMMO and Poly-BAMO and their Precursors as Energetic Binders to be Used in Solid Propellants
Published in Propellants, explosives, pyrotechnics (01-10-2006)“…To establish the relation between structure and properties of composite solid propellants it is important to know the structure of the elastomeric binder that…”
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Mercapto-modified copolymers in polymer blends, 1. Functionalization of EPDM with mercapto groups and its use in NBR/EPDM blends
Published in Macromolecular rapid communications. (01-10-1999)“…Ethylene‐propylene‐diene rubber (EPDM) was reacted with thioacetic acid in the presence of 2,2′‐azoisobutyronitrile (AIBN), giving rise to thioacetate‐modified…”
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Comparação de Técnicas FTIR de Transmissão, Reflexão e Fotoacústica na Análise de Poliamida-6, Reciclada e Irradiada
Published in Polímeros, ciência e tecnologia (01-01-2002)“…Um estudo comparativo envolvendo técnicas de análise por espectroscopia no infravermelho com transformada de Fourier (FTIR) de transmissão, reflexão e…”
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Composite materials constituted by a modified polypropylene fiber and epoxy resin
Published in Journal of applied polymer science (05-07-1999)“…A polyblend fiber constituted of polypropylene (PP) and an ethylene–vinyl acetate copolymer modified with mercapto groups was employed for the preparation of…”
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12
Polyblend fibers from polypropylene and mercapto-modified EVA
Published in Journal of applied polymer science (19-12-1997)“…Polyblend fibers were made from mixtures of polypropylene (PP) and ethylene‐vinyl acetate copolymers (EVA) or their mercapto‐modified products…”
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Determinação por espectroscopia nas regiões MIR/NIR do teor de NCO em adesivos poliuretânicos Determination of NCO contents in polyurethane adhesives using MIR/NIR spectroscopies
Published in Polímeros, ciência e tecnologia (01-03-2008)“…Adesivos poliuretânicos (AD-PU), contendo teor conhecido de isocianato (NCO), foram preparados, nos laboratórios da Rohm and Haas Química Ltda, e amostras…”
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14
Determinação por espectroscopia nas regiões MIR/NIR do teor de NCO em adesivos poliuretânicos
Published in Polímeros, ciência e tecnologia (01-03-2008)“…Adesivos poliuretânicos (AD-PU), contendo teor conhecido de isocianato (NCO), foram preparados, nos laboratórios da Rohm and Haas Química Ltda, e amostras…”
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15
Avaliação da aplicabilidade de técnicas MIC/FT-IR/DSC para a caracterização de filmes multicamadas Evaluation of MIC/FT-IR/DSC techniques for multilayer films characterization
Published in Polímeros, ciência e tecnologia (01-06-2007)“…Técnicas FT-IR de transmissão, reflexão atenuada (ATR), reflexão difusa (DRIFT), microscopia acoplada ao FT-IR (MIC/FT-IR) e detecção fotoacústica (PAS) foram…”
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Avaliação da aplicabilidade de técnicas MIC/FT-IR/DSC para a caracterização de filmes multicamadas
Published in Polímeros, ciência e tecnologia (01-06-2007)“…Técnicas FT-IR de transmissão, reflexão atenuada (ATR), reflexão difusa (DRIFT), microscopia acoplada ao FT-IR (MIC/FT-IR) e detecção fotoacústica (PAS) foram…”
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Determination of CHN content in energetic binder by MIR analysis
Published in Polímeros, ciência e tecnologia (01-03-2007)“…Azide polymers samples were analyzed by FT-MIR in order to develop a quantitative methodology to determine the C, H and N content in energetic polymers used in…”
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Determinação por Espectroscopia nas Regiões MIR/NIR do Teor de NCO em Adesivos Poliuretânicos
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Determinação da distribuição de funcionalidade de HTPB e verificação de sua influência no comportamento mecânico de poliuretano utilizado em motor-foguete Determination of functionality distribution of HTPB and evaluation of its influence in the mechanical behaviour of polyurethane used in rocket cases
Published in Polímeros, ciência e tecnologia (01-03-2006)“…Um método SEC com dupla detecção para determinação de distribuição de funcionalidade de resina polibutadiênica hidroxilada HTPB foi desenvolvido,…”
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20
Determinação da distribuição de funcionalidade de HTPB e verificação de sua influência no comportamento mecânico de poliuretano utilizado em motor-foguete
Published in Polímeros, ciência e tecnologia (01-03-2006)“…Um método SEC com dupla detecção para determinação de distribuição de funcionalidade de resina polibutadiênica hidroxilada HTPB foi desenvolvido,…”
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