Resumo

MESA RUEDA, FABIO AUGUSTO; CUELLAR BURGOS, ALNEIRA; VARGAS HERNANDEZ, CARLOS  e  PERILLA PERILLA, JAIRO ERNESTO. KINETIC AND MECHANISM OF DIGLYCIDYL ETHER OF BISPHENOL A AND TRIMETILEN GLICOL di-p-AMINOBENZOATE CROSSLINKING. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.162, pp.21-29. ISSN 0012-7353.

Autocatalytic cure kinetics for a crosslinking epoxy system was studied by manual titration of oxirane groups for the quantitative determination of the percent epoxide content and epoxide conversion before significant effect of gelification and vitrification events. The system used in this study was the diglycidyl ether of bisphenol A(DGEBA)/trimetilen glicol di-p-aminobenzoate (TMAB). The shape of the conversion curves was sigmoid, and this meant that DGEBA/TMAB system underwent an autocatalytic cure reaction. From the comparison between theoretical prediction and experimental data, it was found that the autocatalytic expression correctly represented to analyze the cure kinetics of these systems.

Palavras-chave : Diglycidyl ether of bisphenol-A; DGEBA; trimethylene glycol di-p-aminobenzoate; TMAB; thermosetting polymers; curing mechanism; crooslinking kinetic.

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