Effect of binder on hydrothermal aging of resin-impregnated glass fiber roving composite

摘要

This study dealt with the effect of binder on hydrothermal aging of glass fiber reinforced cross-linked polyester composite. The glass fiber rovings with different types (composition and amount) of binder were used as reinforcement in order to examine the effect of binder on aging processes. By using these rovings, unidirectional glass fiber roving reinforced cross-linked polyester composites were prepared, and they were immersed in distilled water at 95℃. The weight changes due to aging were not sensitive to the amount of binder, however, they depended on the composition of binder. In the composite with binder for chopped strand mat, the water penetrated to the dissolved interface, and as a result, the weight gain showed remarkable increase at longer immersion time. In the composite with binder for continuous strand mat, the dissolution of binder occurred at the vicinity of specimen edges, and such dissolved region did not keep the water inside the material. As a result, the weight gain of this composite was lower than the others.