Hits:
Indexed by:期刊论文
Date of Publication:2017-03-07
Journal:POLYMER CHEMISTRY
Included Journals:SCIE、EI
Volume:8
Issue:9
Page Number:1449-1453
ISSN No.:1759-9954
Abstract: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.
Pre One:The terpolymerization of ethylene and propylene with isoprene via THF-containing half-sandwich scandium catalysts: a new kind of ethylene-propylene-diene rubber and its functionalization
Next One:Copolymerization of propylene with styrene and ethylene by a THF-containing half-sandwich scandium catalyst: efficient synthesis of polyolefins with a controllable styrene content
