RAFT聚合制备嵌段共聚物PS-b-PNIPAAm  

Synthesis of block copolymer PS-b-PNIPAAm via RAFT

作　　者：冯霞[1] 马绍玲 王兆光[1] 

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387

出　　处：《天津工业大学学报》2016年第1期12-16,共5页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(51303129);天津市科技特派员项目(14JCTPJC00522);高等学校博士学科点专项科研基金(20121201120005)

摘　　要：以三硫代十二烷酸-2-氰基异丙酯(CPDTC)为RAFT试剂,以AIBN为引发剂,用可逆加成-断裂链转移(RAFT)活性自由基聚合方法制备了结构明确、窄分子质量分布的(Mw/Mn=1.283)的聚(苯乙烯)-b-聚(N-异丙基丙烯酰胺)嵌段共聚物,并通过核磁共振氢谱和凝胶渗透色谱对其表征.结果表明:PS-b-PNIPAAm嵌段共聚物已经成功合成,且合成纯度较高,分子质量分布较窄,嵌段比约为2∶1.A diblock copolymer of poly(styrene)-b-poly(N-isopropylacrylamide) with well-defined structure and narrow molecular weight distribution(Mw/Mn= 1.283) was synthesized via reversible addition-fragmentation chain transfer(RAFT) polymerization using 2-cyanopropan-2-yl dodecyl trithiocarbonate(CPDTC) and 2,2-azobisisobutyronitrile(AIBN) as chain transfer agent and initiator respectively. The structure of copolymers was characterized by proton nuclear magnetic resonance(1H-NMR) spectrometry and gel permeation chromatography(GPC). The results indicated that PS-b-PNIPAAm was synthesized with high purity, narrow molecular weight distribution and the block ratio was 2∶1.

关 键 词：RAFT试剂 RAFT聚合 嵌段共聚物 苯乙烯 聚N-异丙基丙烯酰胺 

分 类 号：TQ325[化学工程—合成树脂塑料工业]