抗静电软质聚氯乙烯材料的研究  

Study on Antistatic Plasticized Poly(vinyl chloride)

作　　者：吕瑞华[1] 雷景新[1] 冯新亮[1] 李启满[1] 

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室,四川成都610065

出　　处：《中国塑料》2005年第1期58-61,共4页China Plastics

摘　　要：采用表面电阻测试和扫描电镜 ,分析研究了软质聚氯乙烯 (PVC)树脂与炭黑 (CB)复合体系的抗静电性与炭黑含量、分布形态、PVC树脂型号及混炼塑化工艺之间的关系。结果表明 :在炭黑临界添加量 18%时 ,较短的混炼时间内 ,不同型号的PVC树脂基体中均能形成导电网络 ,体系的导电性能迅速提高 ,可达到抗静电的目的。相同混合和成型条件下 ,与SG 3树脂相比 ,炭黑在相对分子质量较大的SG 2基体树脂中更易形成均匀分布形态 ,破坏导电网络 ,导致电性能随混炼时间迅速下降。力学性能测试表明 :炭黑的加入使复合体系的拉伸强度和断裂伸长率降低。Antistatic properties of carbon black (CB) filled plasticized poly(vinyl chloride) (PVC) were studied using surface resistivity tester and SEM. A critical CB content of 18 % was found independent of matrix resin, above which, at a short rolling time, the CB percolated and the conductivity of the system increased rapidly. The dispersion of CB in SG-2 resin (higher molecular weight) was more uniform than in SG-3 (lower molecular weight), the conductivity decreased rapidly with increasing rolling time. As the content of CB increased, the tensile strength and elongation at break of PVC/CB composites decreased.

关 键 词：软质聚氯乙烯 表面电阻 抗静电 炭黑 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]