CO2在固态聚丙烯/滑石粉复合材料中的溶解和扩散Dissolution and Diffusion of CO2 in Soild-State PP/talc Composites
胡冬冬,李戬,刘涛,赵玲
摘要(Abstract)：
利用重量分析的方法测定了温度分别为343.15、373.15和393.15 K,压力0~16 MPa范围内,CO2在聚丙烯(PP)、PP/滑石粉和界面改性PP/滑石粉复合材料中的溶解度和扩散系数。CO2在未经界面改性PP/滑石粉复合材料中的溶解度低压下大于而高压下小于其在纯PP中的溶解度,在经过界面改性的PP/滑石粉复合材料中的溶解度小于其在纯PP和未经界面改性复合材料中的溶解度。CO2在PP/滑石粉复合材料中的扩散系数小于其在纯PP中的扩散系数,填料含量越大扩散系数越小。通过S-L状态方程关联了CO2在纯PP和经过界面改性的PP/滑石粉复合材料非晶区的溶解度,并计算了CO2对聚合物基体的溶胀情况,证实了填料对聚合物分子链运动的阻碍作用。
关键词(KeyWords)： 二氧化碳;聚丙烯;复合材料;溶解度;扩散系数
基金项目(Foundation): 国家高技术研究发展计划(863计划,2012AA040211);; 教育部博士点基金(20130074110013)
作者(Author): 胡冬冬,李戬,刘涛,赵玲
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