非离子型表面活性剂对氯乙烯-水界面张力和保胶能力的影响  

Influences of non-ionic surfactant on vinyl chloride/water interfacial tension and colloidal protection ability

作　　者：黄东[1] 林毓敏[2] 黄志明[2] 包永忠[2] 

机构地区：[1]新疆天业股份有限公司石河子化工厂,新疆石河子832012 [2]浙江大学聚合反应工程国家重点实验室,浙江杭州310027

出　　处：《聚氯乙烯》2008年第12期25-28,共4页Polyvinyl Chloride

摘　　要：以聚乙烯醇/羟丙基甲基纤维素(KH20/60SH50)为主分散剂,非离子表面活性剂Span60为助分散剂,考察氯乙烯悬浮聚合中油—水界面张力和保胶能力随非离子表面活性剂浓度的变化,发现非离子表面活性剂降低界面张力的能力和效率都强于主分散剂,但界面保胶能力不如后者;从Gibbs界面吸附公式和R值理论出发建立非离子表面活性剂、主分散剂在油—水界面上的竞争吸附模型,认为主分散剂/助分散剂混合使用时,助分散剂优先吸附于界面,在降低界面张力的同时也使分散体系保胶能力下降。Using poly(vinyl alcohol)/hydroxypropyl methyl cellulose(KH20/60SH50) as primary dispersant and non-ionic surfactant Span 60 as secondary dispersant,changes of oil-water interfacial tension and colloidal protection ability with the concentration of non-ionic surfactant in the vinyl chloride suspension polymerization system were investigated.It was found that non-ionic surfactant was more effective in decreasing the interfacial tension than the primary dispersant,while the colloidal protection ability of non...

关 键 词：氯乙烯 悬浮聚合 分散剂 非离子表面活性剂 界面张力 保胶能力 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]