PVC／ABS／CPE共混体系的相容性与性能研究

Study on the Compatibility and Properties of PVC/ABS/CPE Blends

关键词:  聚氯乙烯 氯化聚乙烯 共混 耐水性

Key words:  poly(vinyl chloride),acrylonitrile butadiene styrene copolymer,chlorinated polyethylene,blend

摘要:

聚氯乙烯（PVC）／丙烯晴－丁二烯－苯乙烯共聚物（ABS）共混体系为不相容体系。如入增容剂氯化聚乙烯（CPE）后，相容性明显提高，为部分相容；通过改变ABS用量可调节PVC／ABS／CPE共混体系的韧性；就不同ABS含量对PVC／ABS／CPE共混体系的相容性、拉伸强度、弯典强度、冲击强度、硬度、耐热性能以及耐水性能的影响进行了研究，结果表明，随着ABS含量的增加，PVC／ABS／CPE共混体系的拉伸强度、耐热性、吸水性略有增加，冲击强度有较大提高，而弯曲强度略有下降；当ABS含量超过30％（质量分数）后，共混体系的冲击强度基本上与ABS的相当；ABS含量低于70％（质量分数）的共混体系的表面硬度高于ABS的硬度，基本上与硬质PVC的接近。

Abstract:

Poly(vinyl chloride)(PVC)/Acrylonitrile butadiene styrene copolymer(ABS) blend is an immiscible system. The compatibility of the blend can be improved by the addition of chlorinated polyethylene (CPE). In this work, the effects of ABS content on the compatibility, tensile strength, bending strength, impact strength, Vicar softening temperature, surface hardness and water adsorption of PVC/ABS/CPE blends were studied. The tensile strength of the blend has a little increase with increasing ABS content. Increasing ABS content, the impact strength, Vicar softening temperature of PVC/ABS/CPE blends are improved, while the bending strength has a small decrease.