高聚合度聚氯乙烯共混改性研究 Ⅱ高聚合度聚氯乙烯/EPDM共混体系

Study on Modification of HPVC by Blending Part 2 HPVC/EPDM Blend

研究了共混方法、共混温度、共混时间、共混比对高聚合度聚氯乙烯（ＨＰＶＣ）／ＥＰＤＭ共混物结构和性能的影响。结果表明，采用一阶共混法可获得最佳共混效果，共混温度宜为１７０～１７５℃，ＨＰＶＣ／ＥＰＤＭ共混体系是热力学不相容体系，其较好的界面相容剂为氯化聚乙烯和聚乙烯接枝马来酸酐，用量以９份为宜（对于共混比为３０／７０的体系）。Ｋｒａｕｓ方程可以较好地表征ＨＰＶＣ／ＥＰＤＭ共混体系的界面作用强度。

The influence of the bleding process,temperature,cycle and ratio on the structure and properties of HPVC/EPDM blend was studied.The results showed that the optimal blending effect could be obtained by using onestep process at 170～175 ℃;HPVC/EPDM blend was a thermodynamically incompatible system and 9 phr of CPE or PVCgMAH was suitable interface compatibilizer for the HPVC/EPDM blend with ratio of 30/70;the interface strength of HPVC/EPDM blend could be characterized with Kraus equation.