原子转移自由基聚合法制备星形聚苯乙烯  

Synthesis of star-shaped polystyrene via atom transfer radical polymerization

作　　者：刘长玲[1] 杨俊峰[2] 于济宁[2] 宋岩[1] 

机构地区：[1]吉林化工学院材料科学与工程学院,吉林吉林132022 [2]中国石油吉林石化公司研究院,吉林吉林132022

出　　处：《合成橡胶工业》2015年第5期342-344,共3页China Synthetic Rubber Industry

摘　　要：采用原子转移自由基聚合（ATRP）法,以三羟甲基丙烷为核制备引发剂,以苯乙烯为单体,合成三臂聚苯乙烯星形聚合物,并用傅里叶变换红外光谱（FTIR）、核磁共振氢谱（1H-NMR）、凝胶渗透色谱（GPC）对所得引发剂和聚合物的结构进行了表征。结果表明,FTIR证实了三臂引发剂和聚苯乙烯的存在。1H-NMR分析证实,采用ATRP法可以成功合成出目标产物星形聚苯乙烯。GPC分析证明了所得产物的数均分子量为2 700~9 460,基本符合预期值;多分散性指数仅为1.01~1.05,具备活性聚合特征。A three-armed star-shaped polystyrene （PS） was synthesize ：l via atom transfer radical polymerization（ATRP） in the presence of trifunctional initiator prepared with trimethyolpropane as core by using styrene as monomer, and the structure of the obtained three-armed initiator and polymer were characterized by infrared spectroscopy （FTIR） , proton nuclear magnetic resonance spectroscopy （^1H- NMR） and gel permeation chromatography （GPC）. The results showed that the three-armed initiator and PS were existed, which confirmed by FTIR, and the desired product was synthesized successfully by ATRP method, which was demonstrated by I H- NMR. The number-average molecular weight of the star-shaped PS was 2 700 -9 460 analyized by GPC, which accorded with the expected value, and the polydispersity index was only 1.01 - 1.05, exhibiting the living polymerization feature.

关 键 词：原子转移自由基聚合 星形聚苯乙烯 三臂引发剂 分子量分布 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]