Synthesis and Characterization of Star-Branched Polyisobutylene with SIpS Triblock Copolymer Core

被引：4
|
作者：
Wu, Yibo [1 ,2 ]
Guo, Wenli [1 ]
Li, Shuxin [1 ]
Gong, Huiqing [2 ]
机构：
[1] Beijing Inst Petrochem Technol, Dept Mat Sci & Engn, Beijing 102617, Peoples R China
[2] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 112卷 / 06期
关键词：
cationic polymerization; polystyrene-b-polyisoprene-b-polystyrene; star-branched polymer; polyisobutylene; POLY(STYRENE-B-ISOBUTYLENE-B-STYRENE) BLOCK-COPOLYMERS; LIVING CARBOCATIONIC POLYMERIZATION; CATIONIC-POLYMERIZATION; TRANSFECTION REAGENTS; MOLECULAR-WEIGHT; POLYMERS; CHLORIDE; SYSTEM; SIZE;
D O I：
10.1002/app.29665
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Well-defined polystyrene-b-polyisoprene-b-polystyrene (SIpS) triblock copolymers with different microstructures were synthesized by living anionic polymerization. The synthesis of star-branched polyisobutylene (PIB) was accomplished by the cationic polymerization in 2-cl-doro-2,4,4-trimethylpentane/titanium tetrachloride/SIpS triblock copolymer/2,6-di-tert-butylpyridine initiating system. The double bonds in SIpS triblock copolymer were activated as starting points for isobutylene polymerization. The formation of star-branched architecture was demonstrated by size-exclusion chromatography with quadruple detection: refractive index, multiangle laser tight scattering, viscometric, and ultraviolet detectors. SIpS triblock copolymer with high 3,4-PIp content is more reactive than that with high 1,4-PIp content in cationic initiating stage. The yields of star-branched PIB were remarkably dependent on the reaction time of TMP+ with SIpS. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 3294-3299, 2009
引用
收藏
页码：3294 / 3299
页数：6
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