苯乙烯微乳液种子聚合  

Microemulsion Seeded Polymerization of Styrene

作　　者：徐相凌[1] 张志成[1] 吴欣[1] 葛学武[1] 左榘[2] 牛爱珍[2] 

机构地区：[1]中国科学技术大学应用化学系 [2]南开大学化学系吸附与分离功能高分子材料国家重点实验室

出　　处：《高等学校化学学报》1998年第7期1166-1170,共5页Chemical Journal of Chinese Universities

摘　　要：通过观测苯乙烯微乳液种子聚合前后体系内聚合物粒子大小及其分布的变化发现，无论是γ射线还是ＫＰＳ引发，聚合过程中都没有新的聚合物粒子生成．尽管聚合前体系中存在单体溶胀的胶束，但在聚合过程中这些胶束主要充当单体仓库，自己成核聚合的几率很低．由于微乳液种子聚合体系内，单体量相对较低，聚合物粒子数目很大，其聚合动力学明显不同于常规乳液种子聚合．Microemulsion seeded polymerizations of styrene were studied with γ ray or potassium persulfate. After examining the size of polymer particles and its distribution before and after polymerization, it was found that there were no new particles formed during polymerization, despite that there were micelles in aqueous phase. These micelles acted as monomer reservoir during polymerization, instead of nucleating loci. Due to the lower monomer content and the much more polymer particles in microemulsion seeded polymerization, its polymerization behavior was much different from the emulsion seeded polymerization.

关 键 词：微乳液聚合 种子聚合 苯乙烯 聚苯乙烯 

分 类 号：O632.13[理学—高分子化学]