摘要
对191#不饱和聚酯及其玻璃钢进行了人工热氧加速老化和人工氙灯加速老化试验。用显微镜观察了试样的外观形貌,用光泽度仪测试了试样光泽度,色差计测定了试样表面的黄色指数,对聚酯进行了FT-IR和DMA分析,测试了聚酯和玻璃钢的拉伸强度和弯曲强度。试验表明,随着加速老化时间的延长,试样表面出现光泽度降低、泛黄、龟裂等现象,且失光率、泛黄程度、裂纹长度和力学性能的变化与人工老化方式相关,DMA分析证实聚酯氙灯老化90天后Tg由84℃上升到88℃,老化240天后为83℃,聚酯老化后的储存模量也有一定程度的下降;而弯曲强度、拉伸强度则出现先上升后下降趋势;191#聚酯/玻璃钢对氙灯老化更为敏感。
The aging behavior of 191# unsaturated polyester resin and its GFRP have been studied by artificial thermo-oxidation aging and artificial xenon arc lamp aging. The morphology and glossiness of specimens were investigated by microscope and gloss-meter respectively. The yellowness index （YI） was tested by differential colorimeter. The unsaturated polyester resin was analysed by FT-IR and DMA. The tensile strength and bend strength of thespecimens were measured. With aging evolving, the appearance of the specimens changed more and more yellow,its glossiness reduced, and appeared some crack on the sample＇ s surface. These changes were related to the aging mode. The DMA showed that after xenon arc lamp aged 90d, Tg of the resin was from 84℃ to 88℃, and to 83℃ after aged 240d, and its storage energy decreased gradually. Mechanical strength of the specimens increased at first then decreased. The aging of the resin and its composites were more susceptible to xenon arc lamp than thermo-oxidation.
出处
《玻璃钢／复合材料》
CAS
CSCD
2009年第5期53-56,35,共5页
Fiber Reinforced Plastics/Composites
基金
国家自然基金重点项目(50533060)
关键词
不饱和聚酯
玻璃钢
人工加速老化
光泽度
黄色指数
unsaturated polyester resin
glass fiber reinforced plastic
artificial accelerated aging
glossiness
yellowness index （YI）
