{"title":"Mechanism of photoinitiated radical polymerization of styrene in the presence of benzyldithiocarbamate iniferter","authors":"M.Yu. Zaremskii, A.V. Olenin, Ye.S. Garina, S.I. Kuchanov, V.B. Golubev, V.A. Kabanov","doi":"10.1016/0032-3950(91)90104-X","DOIUrl":null,"url":null,"abstract":"<div><p>The kinetics and mechanism of radical polymerization with participation of iniferter is studied using the styrene-<em>S</em>-benzyl-<em>N</em>,<em>N</em>-diethyldithiocarbamate system as an example. The identity of the photocomposition of <em>S</em>-benzyl-<em>N</em>,<em>N</em>-diethyldithiocarbamate and polystyrene macroiniferter is demonstrated by an ESR method, and the special features of the transformation of the molecular mass distribution during polymerization are revealed by means of GPC. It is shown that polymerization is characterized by the absence of bimolecular termination of the growing macroradicals and a stepped mechanism of the chain propagation reaction. The experimental data are in good agreement with our previously proposed general kinetic scheme for radical polymerization with the participation of iniferter.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 10","pages":"Pages 2036-2045"},"PeriodicalIF":0.0000,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90104-X","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science U.s.s.r.","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/003239509190104X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2003/6/11 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
The kinetics and mechanism of radical polymerization with participation of iniferter is studied using the styrene-S-benzyl-N,N-diethyldithiocarbamate system as an example. The identity of the photocomposition of S-benzyl-N,N-diethyldithiocarbamate and polystyrene macroiniferter is demonstrated by an ESR method, and the special features of the transformation of the molecular mass distribution during polymerization are revealed by means of GPC. It is shown that polymerization is characterized by the absence of bimolecular termination of the growing macroradicals and a stepped mechanism of the chain propagation reaction. The experimental data are in good agreement with our previously proposed general kinetic scheme for radical polymerization with the participation of iniferter.
以苯乙烯- s -苄基- n, n -二乙基二硫代氨基甲酸酯体系为例，研究了干扰素参与自由基聚合的动力学和机理。用ESR方法证明了s -苄基- n、n -二乙基二硫代氨基甲酸酯和聚苯乙烯巨干扰素的光合成的同一性，用GPC方法揭示了聚合过程中分子质量分布变化的特殊特征。结果表明，聚合反应的特点是生长的大分子自由基没有双分子终止，链的传播反应是阶梯式的。实验数据与我们先前提出的有干扰素参与的自由基聚合的一般动力学方案一致。
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