郭方
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发布时间：2019-03-12
论文类型：期刊论文
发表时间：2017-03-07
发表刊物：POLYMER CHEMISTRY
收录刊物：EI、SCIE
卷号：8
期号：9
页面范围：1449-1453
ISSN号：1759-9954
摘要：The synthesis of stereoregular star polymers, including star cis-1,4-PB, star cis-1,4-PB-ran-3,4-PI and star cis-1,4-PB-b-syn-PS, through an "arm-first" approach via a living coordination polymerization mechanism is reported in this work for the first time. The half-sandwich scandium catalyst ( C5Me4SiMe3) Sc( CH2SiMe3)(2() THF) activated with [ Ph3C][B(C6F5)(4)] is used herein. Star cis-1,4-PB compounds with various arm lengths and arm numbers ranging from 1.0 x 10(4) to 6.5 x 104 g mol(-1) and 7.6 to 26.4, respectively, are produced by tuning the polymerization parameters. Additionally, the stereoregular star cis-1,4-PB-ran-3,4-PI and star cis-1,4-PB-b-syn-PS are also explored in the same way with average arm numbers of 21.4 and 16.5 and 35% and 41% star yield, respectively.
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