特殊环境对玻璃纤维/EP复合材料典型力学性能的影响  

Effect of Special Environment on Typical Mechanical Property of Glass Fiber/Epoxy Composites

作　　者：王一靓[1] 刘婷[1] 左景奇[1] 杨名波[1] 吴祖胜[1] WANG Yi-liang;LIU Ting;ZUO Jing-qi;YANG Ming-bo;WU Zu-sheng(Zhuzhou Times New Material Technology Co.,Ltd.,Zhuzhou 412001,China)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412001

出　　处：《塑料工业》2021年第9期110-114,共5页China Plastics Industry

摘　　要：采用自制环氧树脂和玻璃纤维布制造特高压换流阀用层压复合材料。将复合材料分为3组,分别进行热(TA)、冷热冲击(CTSA)和湿热(WHA)3种试验环境条件下老化试验。在这3种试验环境条件下,分别测试了复合材料抗拉、弯曲、冲击力学性能。根据试验结果,研究了特殊环境对玻璃纤维/环氧树脂复合材料典型力学性能的影响,并分析了环境条件下拉伸断口微观形貌。研究表明:以老化前的性能为基准,各项强度性能在热条件下均上升,而在冷热冲击和湿热条件下均下降。其中,在热、冷热冲击和湿热条件下,抗拉强度分别为老化前的102%、84%、80%,弯曲强度为分别为老化前的105%、95%、88%,冲击强度分别为老化前的105%、88%、85%。通过拉伸断面分析,热老化后断口整齐,纤维与树脂结合良好,冷热冲击老化和湿热老化后纤维和树脂界面的结合力下降,导致复合材料宏观力学性能下降。Self-made epoxy and glass fiber were used to fabricate laminated composite for ultra high voltage direct current(UHVDC)valve.There composites were categorized into three groups corresponding to three types of environmental condition of testing,which were thermal aging(TA),cold and thermal shock aging(CTSA)and wetting heat aging(WHA),respectively.Under the three types of test environmental condition,the composite mechanical properties of tensile,flexural,impact were tested.Based on the test results,the effect of environmental condition on typical mechanical properties of composites were studied,and the microstructure of tensile fracture surfaces under environmental conditions were analyzed.This study indicates that taking before cyclic aging as baseline,it rises in TA condition but descends in CTSA condition and WHA condition for each type of strength property.Under the condition of thermal aging,cold thermal shock aging and wetting heat aging,tensile strength have become 102%,84%and 80%,impact strength has become 105%,88%and 85%,tensile strength has become 102%,84%and 80%of that before aging.Through composite tensile fracture analysis,the fracture is neat after TA,the bonding force between fiber and resin is good,and the bonding force between fiber and resin interface decrease under CTSA and WHA,which leads to the decrease of the macroscopic mechanical properties of the composite.

关 键 词：环氧树脂 玻璃纤维 复合材料 力学性能 环境老化 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]