Curing study of epoxy resin by new aromatic amine functional curing agents along with mechanical and thermal evaluation

Maity, Tithi; Samanta, Bidhan Chandra; Dalai, Sudipta; Banthia, A. K.

doi:10.1016/j.msea.2007.01.128

Cited by 79 publications

(26 citation statements)

References 7 publications

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“…The C-H stretching in formaldehyde generally comes at 2850 cm −1 . It confirms that the presence of -CH 2 moiety in AF has been introduced from formaldehyde unit [18].…”

Section: Ftir Analysissupporting

confidence: 72%

Synthesis and Thermal and Textural Characterization of Aniline Formaldehyde-Organoclay Composites

et al. 2016

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In this study, the synthesis of aniline-formaldehyde resin, and its thermal and structural characterization, as well as the preparation and characterization of the resin-organoclay composites were carried out. For this, first, at 70• C and acidic conditions the aniline formaldehyde prepolymer was prepared and then cured at 120• C under vacuum. The structural and thermal characterization of the resin was made using FTIR and DSC techniques. By using the Cetyltrimethylammonium Bromide modified Montmorillonite (OMMT) and the synthesized resin, the resin-organoclay composites were prepared by melt intercalation method. Characterization of the resin-organoclay composites prepared with the different ratios of organoclay is made with the same techniques. The FTIR and thermal analysis results of the composites indicate that a cross-linked polymeric matrix was formed. The thermal behavior of the composites has also significantly changed compared to pure resin.

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“…The C-H stretching in formaldehyde generally comes at 2850 cm −1 . It confirms that the presence of -CH 2 moiety in AF has been introduced from formaldehyde unit [18].…”

Section: Ftir Analysissupporting

confidence: 72%

Synthesis and Thermal and Textural Characterization of Aniline Formaldehyde-Organoclay Composites

et al. 2016

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“…The change of enthalpy which occurred during this process is decreased with a decrease in the amount of epoxy matrix in the composites. Small endothermic effects in temperature range between 47 ºC and 50 ºC are referring to glass transitions in the investigated composite materials (Maity et al, 2007). The quantitative values of degradation temperatures and the corresponding changes in enthalpy are presented in Table 2.…”

Section: Thermal Propertiesmentioning

confidence: 99%

“…3b show that glass transition temperatures (Tg) obtained from tan curves for all investigated magnetic composites were found to lay in the same temperature region (around 54 C). This could be a consequence of the use of Nd-Fe-B powders with similar particle size distribution and without particle surface modification (uncoated) (Otaigbe et al, 1999 The difference in Tg value for each composite obtained from DSC and DMA arises due to the difference in the method of measurement and the variations in the definition of transition temperature used (Maity et al, 2007).…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

“…The values of elastic modulus, obtained by tensile and flexural tests, upswing with an increasing amount of Nd-Fe-B powder from 50 wt% achieve 9.2 and 7.1 GPa, respectively. Within the narrow region, up to 20 wt% content of Nd-Fe-B, where the modulus of elasticity is practically constant according to tensile and flexural tests, dynamic-mechanical analysis could be applied to acquire additional information's related to mechanical behaviour about transitions in polymer composites (Maity et al, 2007;Almagableh et al, 2008).…”

Section: Tensile and Flexural Propertiesmentioning

confidence: 99%

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Magnetic and Dynamic Mechanical Properties of Nd-Fe-B Composite Materials with Polymer Matrix

Stajić-Trošić¹,

Stijepović²,

Stevanović³

et al. 2011

Metal, Ceramic and Polymeric Composites for Various Uses

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“…A maioria dos estudos onde se utiliza a técnica de DSC no monitoramento das reações de cura de resinas epóxi comerciais refere-se a compostos bi, tri e multifuncionais [4,[19][20][21] .…”

Section: Introductionunclassified

Investigação da cinética de cura por calorimetria diferencial exploratória (DSC) de resinas epóxi preparadas a partir de óleo de soja epoxidado com diferentes anidridos e aminas terciárias

2011

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Resumo:No presente trabalho, utilizou-se a calorimetria diferencial exploratória (DSC) para investigar a cinética da reação de cura de resinas epóxi produzidas a partir da reação do óleo de soja epoxidado (ESO), com os anidridos dodecenilsuccínico (DDS), maleico (MAL), ftálico (FTA), succínico (SUC) e hexahidroftálico (CH), atuando como agentes de cura, e na presença de aminas terciárias como a trietilamina (TEA), a N,N'-dimetilanilina (ARO) e a 1,4-diazobiciclo[2,2,2]octano (DABCO), atuando como catalisadores. A taxa de aquecimento, a natureza química e a estrutura do anidrido e das aminas influenciaram a reação de cura. Os métodos dinâmicos de Kissinger, Ozawa e de Barrett foram utilizados para calcular a energia de ativação dos sistemas onde se variou o anidrido. Observou-se que os anidridos mais reativos foram o DDS e maleico que apresentaram os menores valores de energias de ativação. No estudo da influência do catalisador, utilizou-se o método de Barrett para determinar as energias de ativação das reações com as diferentes aminas. A amina cicloaliafática (DABCO) foi a mais reativa obtendo-se o menor valor de energia de ativação (Ea = 51 kJ.mol -1 ) e fator pré-exponencial (ln A 0 = 9 s -1 ). Palavras-chave: DSC, óleo de soja epoxidado, resina epóxi, estudo cinético. Investigation of the Kinetics of Cure by Differential Scanning Calorimetry (DSC) of Epoxy Resins Prepared from Epoxidized Soybean Oil with Different Anhydrides and Tertiary AminesAbstract: In the present work, differential scanning calorimetry (DSC) was used to investigate the curing reaction kinetics of epoxy resins produced from reaction of epoxidized soybean oil (ESO) with cyclic anhydrides dodecenylsuccinic (DDS), maleic (MAL), phthalic (PA), succinic (SUC) and hexahydrophthalic (CH), in the presence of tertiary amines such as triethylamine (TEA), N,N-dimethylaniline (ARO) and 1,4-diazabicyclo[2,2,2]octane (DABCO). The heating rate, the nature and structure of anhydrides and amines were found to affect the curing reaction. The dynamic methods of Kissinger, Ozawa and Barrett were used to calculate the activation energy of the reactions where different anhydrides were used. DDS and maleic anhydrides were more reactive than the others. In studying the influence from the catalyst, we used the Barret's method to determine the activation energy of the reactions. The 1,4-diazabicyclo[2,2,2]octane amine (DABCO) was the most reactive, showing the lowest activation energy (Ea= 51 kJ.mol -1 ) and pre-exponential factor (ln A 0 = 9 s -1 ). Keywords: DSC, epoxidized soybean oil, epoxy resin, kinetic study. IntroduçãoAs resinas epóxi fazem parte de uma das mais importantes classes de polímeros termofixos. As inúmeras formas de processamento tornam possível a sua aplicação em diversos segmentos industriais tais como: tintas, adesivos, revestimentos e como matrizes de compósitos devido a suas propriedades químicas e físicas [1][2][3][4] . Estas resinas têm boas propriedades térmicas, elétricas e mecânicas, embora sejam frágeis e apresentem baixa resistênci...

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Curing study of epoxy resin by new aromatic amine functional curing agents along with mechanical and thermal evaluation

Cited by 79 publications

References 7 publications

Synthesis and Thermal and Textural Characterization of Aniline Formaldehyde-Organoclay Composites

Synthesis and Thermal and Textural Characterization of Aniline Formaldehyde-Organoclay Composites

Magnetic and Dynamic Mechanical Properties of Nd-Fe-B Composite Materials with Polymer Matrix

Investigação da cinética de cura por calorimetria diferencial exploratória (DSC) de resinas epóxi preparadas a partir de óleo de soja epoxidado com diferentes anidridos e aminas terciárias

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