悬浮共聚合法制备聚丙烯酸乙酯/甲基丙烯酸甲酯软微球及动力学研究  

Preparation of Soft Crosslinked Polyacrylate Microsphere and the Kinetic Study

作　　者：石花蕾[1] 龙小燕[1] 王正辉[1] 

机构地区：[1]华南农业大学理学院,广东广州510642

出　　处：《华南农业大学学报》2011年第2期103-106,共4页Journal of South China Agricultural University

基　　金：国家自然科学基金(30571086)

摘　　要：以软单体丙烯酸乙酯（EA）、硬单体甲基丙烯酸甲酯（MMA）为共聚合单体,乙二醇二甲基丙烯酸酯（EGD-MA）为交联剂、聚乙烯醇（PVA）为分散剂,采用悬浮聚合法制备出软微球,研究了搅拌转速、水油比、分散剂和交联剂用量等对交联软微球成球性及平均粒径的影响,通过微球在受定压力作用后形变度的变化研究了聚合的动力学规律.结果表明：交联剂的使用是聚合形成微球的关键因素;搅拌速度对微球的平均粒径影响最为显著;所得软微球平均粒径0.3-0.7 mm;聚合2 h单体转化完全.The soft crosslinked polyacrylate microspheres were obtained by suspension polymerization method with methyl acrylate and ethyl acrylate as monomers,ethyl glycol dimethacylate as crosslinker and polyvinyl alcohol as dispersant.The effects of agitation speed,mass ratio of water phase to oil phase,polymerization time,and the amounts of dispersant and crosslinker on the mean size and deformability of microspheres were investigated.The results showed that crosslinker is the key factor for the successful suspension polymerization,the agitation speed has the major influence on the mean size of microsphere,and the strength of microsphere depends on the amount of crosslinker,and the conversion of monomers can almost complete within 2 h.

关 键 词：悬浮聚合 丙烯酸酯 软微球 动力学 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]