《复合材料学报》优先在线发表论文。
摘 要：对风电工程中采用的玻璃纤维增强环氧乙烯基酯树脂基(GF/EVE)复合材料进行碱-紫外循环加速老化试验，通过分析不同循环老化周期下GF/EVE复合材料吸湿率、微观形貌、表面元素含量、树脂初始分解温度及冲蚀失重率的变化，探讨了GF/EVE复合材料碱-紫外循环老化机制和不同循环老化周期下的抗冲蚀性能的变化。结果表明：在水分子的扩散、水解反应和光氧老化的共同作用下，GF/EVE复合材料表层树脂发生老化降解、纤维与树脂基体界面出现脱黏、纤维发生腐蚀分解；同时循环老化造成树脂分子链的断裂，树脂交联密度的下降，导致树脂初始分解温度下降；在第1个老化周期内GF/EVE复合材料冲蚀失重率下降了2.06%，老化结束时冲蚀失重率增加了32.8%。
关键词：环氧树脂；复合材料；环境老化；吸水率；热稳定性
Abstract：The accelerated aging tests of alkali - ultraviolet circulation of glass fiber/epoxy vinlester (GF/EVE) composites used in wind power project were carried out. The change of moisture absorption rate，micro morphology，surface element content， initial decomposition temperature and erosion mass loss rate of the samples were investigated to reveal the aging mechanism of GF/EVE composites in alkali - ultraviolet circulation aging and the change of erosion resistance of GF/EVE composites under different cyclic aging cycles. The experimental results show that the coaction of photo-oxidative，hydrolysis reaction and water diffusion cause the surface resin of GF/EVE composites aging degradation and fiber decomposition and also cause fiber and resin matrix to debond. The breakdown of resin molecular chain and the decrease of resin crosslinking density cause the decline of initial decomposition temperature of resin under circulation aging. The erosion mass loss rate decreases by 2.06% at the first aging cycle and the erosion mass loss rate increases by 32.8% at the end of aging.
Keywords: epoxy resin; composites; environmental degradation; water absorption; heat stability
作者：代礼葵等，新疆大学机械工程学院，乌鲁木齐
通讯作者：孙耀宁，新疆大学机械工程学院，乌鲁木齐
全文详见中国知网学术期刊优先数字出版。
来源：CSCM_OFFICE 中国复合材料学会
原文链接：https://mp.weixin.qq.com/s?__biz=MjM5MTA2NTk1Nw==&mid=2654409042&idx=3&sn=77fd9af19433759e38bc36eb7992bace&scene=0#wechat_redirect
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