The curing behavior of diglycidyl-4

5-epoxycyclohexane-1

2-dicarboxylate with m-phenylene diamine has been studied by TBA. It is shown that the whole curing process proceeds in two stages

i.e. curing reaction during temperatures below 100℃ mainly occurs at the epoxides on the esterlinkages

whereas a rapid increase in reaction rate of the remaining epoxides on the cyclohexane ring occurs only at temperatures above 130℃. Between the temperature range from 100℃ to 130℃

the reaction of the epoxides on the esterlinka-ges reaches completion

while the reaction rate of the epoxides on thecyclohexane ring be-gins to increase gradually. The apparent activation energy is 13.2kcal/gram-mol.