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在96℃水中,对开芙拉29(Kevlar29),开芙拉49(Kevlar49)和聚苯撑苯并唑(PBO)纤维束增强的环氧树脂和双马树脂基复合材料进行老化实验后,再在60℃下进行干燥脱水处理。实验测定了吸水和脱水阶段的含水率及热水老化试样和干燥试样的弯曲性能。结果表明:在热水作用下,复合材料的弯曲强度和模量随热水老化时间的延长呈下降趋势,纤维与树脂基体间的界面发生破坏;再干燥脱水后,材料的弯曲强度和模量恢复,但仍低于未老化试样的性能,纤维与树脂基体间的界面破坏情况也类似。
After 96 hours of aging experiments on Kevlar 29, Kevlar 49 and polybenzophenoxazole (PBO) fiber bundle-reinforced epoxy resin and bismaleimide based composites , Followed by dry dehydration at 60 ° C. The moisture content of the water absorption and dehydration stages, as well as the bending behavior of hot-water-aged samples and dry samples, were determined experimentally. The results show that under the action of hot water, the flexural strength and modulus of composites decrease with the extension of hot water aging time, and the interface between fiber and resin matrix is destroyed. After drying and dehydration, the flexural strength and modulus Recovery, but still lower than the performance of unaged samples, the interface between the fiber and the resin matrix is similar.