高流动抗冲共聚PP的相态结构

用扫描电子显微镜和偏光显微镜．对氢调法和降解法生产的高流动抗冲共聚聚丙烯(PP)的微观结构进行了分析．特别对其中橡胶相在PP中的形状、尺寸和分布进行了研究。通过进行刻蚀条件的选择，分析比较不同PP中橡胶相微观结构的差异．找出了2种方法生产PP的最佳刻蚀条件。同时．对庚烷及癸烷的可溶物和不溶物做偏光显微分析。结果表明：降解法生产的PP橡胶相中确实存在少量可结晶的聚乙烯链段；在PP链上存在乙丙橡胶链嵌段。

Study on Phase structure of high fluidity impact copolymer of propylene

This paper analyzed the micro-phase structure of high fluidity impact copolymer of propylene prepared with the hydrogen adjusting process and degradation process by means of scanning electron microscope and polarized light microscope (PLM), and emphatically studied the shape, size and its distribution of rubbery phase in the propylene copolymer. The difference in microstructure of the rubbery phases in the different copolymers was compared. The analytical specimens were treated under the optimum condition of etching determined for the copolymers prepared in the two production processes. It is concluded from the observation of soluble and insoluble materials in heptane and decane by PLM that there indeed exist small amount of crystallizable polyethylene chains inside the rubbery phase in the copolymer matrix. Furthermore, there exist certain blocks of ethylene-propylene rubber in the chain of the copolymer.