羟基磷灰石/苯乙烯的原位(共)聚合  

In-situ Hydroxyapatite/Styrene Polymerization and Copolymerization

作　　者：龚兴厚[1] 胡庆军[1] 解孝林[1] 

机构地区：[1]华中科技大学化学系,湖北武汉430074

出　　处：《高分子材料科学与工程》2007年第1期76-79,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(50573026);湖北省青年杰出人才基金(2005ABB001)资助项目

摘　　要：采用羟基磷灰石(HA)/苯乙烯(S t)原位聚合和HA/乙烯基三乙氧基硅烷(V S)/S t原位共聚合处理HA表面。研究结果表明,HA的存在对S t的聚合没有阻聚作用,PS在HA表面有明显的接枝效应,且原位共聚合较原位聚合更有利于PS的接枝。在原位(共)聚合过程中,聚合得到的PS的重均分子量均在30万以上。随着单体用量增加,PS的分子量呈增高的趋势、分子量分布趋于变窄,且原位共聚合所得PS的分子量比原位聚合所得PS的分子量高、分子量分布要窄。The hydroxyapatite （HA） was modified by in-situ polymerization of styrene （St） and in-situ copolymerization of vinyl silane （VS） and St, respectively. The results show that the presence of HA particles does not inhibit the polymerization of St, polystyrene （PS） macromolecules are grafted onto the surface of HA. And in-situ copolymerization of HA/VS/St is more useful for PS to be grafted on the surfaces of HA than in-situ polymerization of HA/St. During the in-situ HA/St polymerization and HA/VS/St copolymerization, the weight-average molecular weight of PS is higher than 300000. With increasing the concentration of styrene, the molecular weight of PS increases, and its distribution becomes narrower. And PS formed by in-situ copolymerization of HA/VS/St has higher molecular weight and narrower distribution than PS formed by in-situ polymerization of HA/St.

关 键 词：羟基磷灰石 表面改性 原位聚合 

分 类 号：TQ316.342[化学工程—高聚物工业]