中文摘要：

采用一步可逆加成－断裂链转移（RAFT）聚合法合成了一系列分子量可控、分子量分布较窄的两亲性嵌段共聚物PEG－b－P（St－co－VBC），并通过凝胶渗透色谱（GPC）、核磁共振谱（NMR）、傅立叶变换红外光谱（FT－IR）和示差扫描量热仪（DSC）对所合成的嵌段共聚物进行了相关表征。结果表明，通过控制聚合单体中对氯甲基苯乙烯（VBC）和苯乙烯（St）的摩尔比，可以实现对两亲性嵌段共聚物PEG－b－P（St－co－VBC）中VBC重复单元的精确控制。随着嵌段共聚物中VBC含量的增加，PEG－b－P（St－co－VBC）的玻璃化转变温度逐渐升高。

英文摘要：

Amphiphilic block copolymers PEG-b -P（St-co-VBC）with controllable molecular weight and low polydispersity were synthesized by one-step reversible addition-fragmentation transfer（RAFT）.The structure and property of the synthesized amphiphilic copolymers were characterized by GPC,NMR,FT-IR and DSC.The results showed that the number of vinylbenzyl chloride （VBC）units in amphiphilic block copolymers PEG-b -P （St -co -VBC ） can be well tuned by controlling the mole ratio of VBC and Styrene （St ）. Moreover,the glass transition temperature of PEG -b -P（St -co -VBC）is gradually increased with the addition of VBC units in block copolymers.