摘要
选择吐鲁番和若羌2个典型干热自然环境开展为期1年的自然大气暴露试验,研究了聚苯乙烯(PS)在干热自然环境下分子结构的变化,并对老化后的PS进行傅里叶变换红外光谱、凝胶渗透色谱和差示扫描量热分析。结果表明,PS发生光氧化反应并发生分子链断裂,导致其相对分子质量降低、相对分子质量分布变宽和玻璃化转变温度降低。
In order to study the molecular structure changes of polystyrene in natural dry-hot environment, outdoor exposure test was performed in Turpan and Ruoqiang for one year, and FTIR, GPC, and DSC analysis were performed thereafter. It showed that photo-degradation and chain scission occurred, resulting in the decreasing of molecular weight, broadening of molecular weight distribution, and lowering of glass transition temperature.
出处
《中国塑料》
CAS
CSCD
北大核心
2013年第6期52-55,共4页
China Plastics
基金
国家973计划课题项目(2012CB724605)
国家自然科学基金项目(51133005)
关键词
聚苯乙烯
干热环境
分子结构
羰基指数
相对分子质量
相对分子质量分布
玻璃化转变温度
polystyrene
dry-hot environment
molecular structure
carbonyl index
molecularweight
molecular weight distribution
glass transition temperature
