에폭시 수지 시스템에서 경화조건이 잔류응력에 미치는 영향

Abstract

A dilatometer was used to investigate the effects of cure conditions, mold types and the presence of filler in an epoxy resin system. The shrinkage was occurred during both curing and cooling after curing in the epoxy resin system. The magnitude of the shrinkage, related to the stress buildup in the epoxy during curing and cooling, was influenced by the processing conditions, filler presence and the nature of the mold used to contain the resin. Cure and cyclic cure at a lower temperature, prior to a post cure, decreased the magnitude of shrinkage. Cure shrinkage decreased with increasing the number of cyclic cure. Post cured sample without the mold led to lower shrinkage compared with post cured sample in the mold. And the sample containing kaolin filler showed less shrinkage than unfilled sample.