SciELO - Scientific Electronic Library Online

 
vol.15 número4Comportamento térmico, mecânico e morfológico de compósitos de polietileno de alta densidade reciclado com fibra de piaçavaEstudo comparativo de amidos termoplásticos derivados do milho com diferentes teores de amilose índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

GONZALEZ-GARCIA, Filiberto; MIGUEZ, Eduardo  e  SOARES, Bluma G.. Characterization of diglycidyl ether of bisphenol A / aliphatic polyamines systems. Polímeros [online]. 2005, vol.15, n.4, pp.261-267. ISSN 1678-5169.  http://dx.doi.org/10.1590/S0104-14282005000400010.

Diglycidyl ether of the bisphenol A (DGEBA), product DER 331 and hardener 24 system marketed by Chemical Dow of Brazil were characterized by spectroscopic, calorimetric and determination of functional groups methods. The hardener 24 is constituted by triethylenetetramine (60 % molar) and a mixture of ethylene polyfunctional amines with linear, ramified and cyclic structures. The epoxy equivalent of the resin corresponds to 187 g eq-1. The functionality average, equivalent amine, and the concentration of the hardener that satisfy the stoichiometry corresponds to 5.54, 27.5 g eq-1, and 14.7 phr, respectively. The epoxy system displayed an enthalpy of reaction of 486 J g-1 (106.6 kJ eq-1), and a glass transition temperature (Tg¥) of 124 ºC. Also presented in this work is a cure program in two stages where the maximum conversion was reached.

Palavras-chave : Diglycidyl ether of bisphenol - A (DGEBA); triethylenetetramine (TETA); diagram conversion time temperature (CTT).

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons