二溴代苯基缩水甘油醚/环氧树脂的共固化行为—FT-IR研究

STUDY ON CO-CURING REACTION OF GLYCIDYL DIBROMOPHENYL ETHER AND BISPHENOL-A EPOXY RESIN BY FT-IR

用傅立叶转换红外光谱(FT-IR)对溴代苯基缩水甘油醚(G-48)与甲基四氢苯酐(THPA)的反应速度进行了测定,并和双酚A环氧树脂(E-39)与THPA的反应进行了比较。结果表明两个反应体系的反应速度随温区不同差别甚大,表观反应活化能的测定值基本相近。变温跟踪G-48/E-39混合体系与THPA固化反应的结果表明其共固化行为大致是G-48/THPA和E-39/THPA两体系反应行为的迭合。讨论了G-48/E-39混合体系的共固化反应机理和共固化条件。

Fourier transform infrared (FT-IR)spectroscopy was used to determine the reaction rate of glycidyl dibromophenyl ether(G-48)with methyl tetrahydrophthalic anhydride(THPA) and to compare it with that of the bisphenol-A epoxy resin(E-39)with THPA. The comparison of the reaction rates of the two systems showed that they were noticeably different in various temperature ranges. The apparent energies of activation of the two systems were approximately equal. The curing process of a system composed of a mixture of G-48 and E-39 with THPA as curing agent also was studied by FT-IR. It has been found that the curing behavior of G-48/E-39 with THPA matched the reaction characteristics of the combination of E-39 and G-48 reacting alone with THPA. The curing mechanism of G-48/E-39 mixture system with THPA was proposed.