胺基双酚钴在合成极性单体与苯乙烯嵌段共聚物中的应用  

Sequential Synthesis of Well-defined Poly(vinylacetate)-block-polystyrene Using Cobalt Complexes by Dispersion Polymerization

作　　者：陈晓梅 王丽英[1] 孙俊民[1] 张永锋[1] CHEN Xiao-mei;WANG Li-ying;SUN Jun-min;ZHANG Yong-feng(Institute of Coal Conversion and Cyclic Economy,School of Chemical Engineering,Inner Mongolia University of Technology,Huhot 010051,Chin)

机构地区：[1]内蒙古工业大学,化工学院呼和浩特煤炭转化与循环经济研究所,内蒙古呼和浩特010051

出　　处：《化学试剂》2021年第8期1117-1123,共7页Chemical Reagents

基　　金：国家自然科学基金资助项目(21762031);2020年度自治区高校“青年科技英才”支持计划项目(NJYT-20-A18)。

摘　　要：采用低成本、高活性胺基-双酚钴配合物调控的自由基聚合(CMRP)和催化链转移反应(CCT)对乙酸乙烯酯或丙烯酸叔丁酯与苯乙烯单体进行了共聚反应。以钴配合物为催化剂、偶氮二异丁腈(AIBN)为引发剂、聚乙烯吡咯烷酮(PVP)为分散剂,通过溶液聚合方法得到的聚乙酸乙烯酯和聚丙烯酸叔丁酯作为大分子引发剂,引发苯乙烯的分散聚合,从而获得具有较低分子量分布(~1.93)的丙烯酸叔丁酯和苯乙烯的共聚物及乙酸乙烯酯和苯乙烯的共聚物(PVAc-b-PS和PtBA-b-PS),数均分子量随单体转化率线性增加。运用凝胶渗透色谱、核磁共振波谱、扫描电子显微镜等测试手段对合成的嵌段共聚物进行了表征。The copolymerization of vinyl acetate or tert-butyl acrylate and styrene monomer was carried out by using low-cost,highly active amino-bis(phenolate)cobalt complex-controlled radical polymerization(CMRP)and catalytic chain transfer reaction(CCT).With cobalt complex as catalyst,azobisisobutyronitrile(AIBN)as initiator,polyvinylpyrrolidone(PVP)as dispersant,polyvinyl acetate and poly(tert-butyl acrylate)obtained by solution polymerization as macroinitiator,the dispersion polymerization of styrene was initiated to obtain copolymers of tert-butyl acrylate and styrene and copolymers of vinyl acetate and styrene(PVAc-b-PS and PtBA-b-PS)copolymers with lower molecular weight distribution(~1.93).The number average molecular weight increases linearly with monomer conversion.The synthesized block copolymer was characterized by gel permeation chromatography,nuclear magnetic resonance spectroscopy,scanning electron microscope and other test methods.

关 键 词：共聚 聚苯乙烯 乙酸乙烯酯 自由基聚合 

分 类 号：TQ326.9[化学工程—合成树脂塑料工业]