| 초록 |
Cycloaliphatic diepoxide resins (CADER) show high reactivity, excellent weatherability, and high optical clarities due to their inherent structural features. In general, CADER are cured via step growth reactions with hardeners such as acid anhydride or cationic polymerizations. But there are few reports on the curing behaviors of the epoxy resins via thermal cationic polymerizations. We have studied curing behaviors of CADER (3,4-epoxycyclohexyl methyl-3,4-epoxycyclohexane carboxylate) employing a DSC and effects of monoepoxide, i.e., cyclohexene oxide (CHO), were especially investigated to improve the flexibility by lowering Tg. 0.5 wt% of cationic initiators were mixture of aluminum acetyl acetonate and dipheny silandiol. It was found that the curing of CADER occurred at lower temperatures with increasing the contents of CHO. Glass transition of CADER occurred in narrow range of temperatures and Tg of CADER after cure decreased with increasing the concentration of CHO. |
