4,5-环氧环己烷1,2-二甲酸二缩水甘油酯的固化行为

本文用动态力学扭辨分析法,研究4,5-环氧环己烷1,2-二甲酸二缩水甘油酯与间苯二胺的热固化动态力学行为。结果表明:固化过程分两个阶段进行,低于100℃时,交联反应主要在缩水甘油酯链的环氧基上进行;100—130℃时为酯链环氧基反应趋近完全和酯环环氧基反应速率逐步增大的过渡区;130℃以上固化时,酯环环氧基才明显地参与固化交联反应。从Arrhenius关系曲线求得本固化体系凝胶点前表现反应活化能为13.2kcal/mol。

CURING BEHAVIOR OF DIGLYCIDYL-4, 5-EPOXYCYCLOHEXANE-1, 2-DICARBOXYLATE

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 esterlinkages reaches completion, while the reaction rate of the epoxides on the cyclohexane ring begins to increase gradually. The apparent activation energy is 13.2 kcal/gram-mol.