摘要
聚苯乙烯是目前用量最大的通用塑料之一,研究其在典型自然环境下的老化机制,对材料改性和提高产品耐候性具有重要意义。通过对改性聚苯乙烯试样在拉萨和漠河进行户外暴露试验,分析自然环境对材料的物理和化学性能的影响,使用环境扫描电子显微镜(ESEM)观察表面形貌,利用X射线光电子能谱(XPS)研究了改性聚苯乙烯材料表面的老化机理。改性聚苯乙烯材料在拉萨地区老化特别严重,户外暴露2年后,材料的冲击强度下降了41%,样品表面氧原子数分数达到47.21%。
Polystyrene is one of the most popular plastic material. The modified polystyrene samples were exposed in outdoor at Lasa and Mohe natural environment test stations. The effects of natural environment on mechanics performance and weathering mechanism were studied by using ESEM and XPS. The impact strength of plastics sample has decreased by 41 percent after exposure test in Lasa natural environment test station for two years, and the apparent concentration （in atomic, % ） of oxygen was up to 47.21%.
出处
《表面技术》
EI
CAS
CSCD
2008年第5期26-28,共3页
Surface Technology
