不饱和聚酯玻璃钢人工加速老化研究  

Study on Artificial Accelerated Aging of Unsaturated Polyester Glass Fiber Reinforced Composites

作　　者：朱春芽[1] 赵晴[1] 孟江燕[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330036

出　　处：《失效分析与预防》2008年第3期12-16,共5页Failure Analysis and Prevention

基　　金：国家自然基金(50533060)重点资助项目

摘　　要：通过氙灯和热氧人工加速老化研究了191#不饱和聚酯玻璃钢老化后力学性能的变化规律,并对玻璃钢表面形貌和失光率进行了表征。结果表明:氙灯老化后,弯曲强度随老化时间增加先增大后减小,而层间剪切强度则呈下降趋势,老化1800h后弯曲和剪切强度的保持率分别为92%和53%。玻璃钢表面失光率大,有明显的裂纹产生。70℃热氧老化,表面形貌保持完好,树脂的后固化和物理老化效应导致玻璃钢的力学强度明显增大,3600h后弯曲和剪切强度增大到老化前强度的107%和150%。光和热的联合作用是玻璃钢表面和界面老化破坏的主要因素。玻璃钢具有较好的耐热氧老化性能。Artificial accelerated aging of No. 191 unsaturated polyester（UP） glass fiber reinforced composites was studied by the xenon arc lamp and thermal oxidative test chamber. The change of mechanical properties was investigated; the surface appearmaces and gloss loss rate were analyzed. It was shown that in the process of xenon light aging, the bending strength increased at first but began to decrease after a period of time, but the interlaminar shear strength decreased nearly all the time. After aging for 1800 hours, the bending strength and shear strength decreased to 92% and 53% respectively. The surface gloss loss rate was high and there were some cracks on the surface. After thermal oxidative aging at 70~C, the surface was till smooth; the mechanical strength was remarkably enhanced by the post-curing and physical aging effects of the resin. After aging for 3600 hours, the bending strength and shear strength increased to 107% and 150% respectively. The co-effect of light and heat is the main failure cause of the surfaces and interfaces of GFRP. GFRP shows excellent resistance to thermal oxidative aging.

关 键 词：不饱和聚酯 玻璃钢 加速老化 层间剪切强度 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]