Highly Reactive Polyisobutylenes via Cationic Polymerization of Isobutylene by AlCl3/Ether Complexes in Non-Polar Media: Scope and Limitations

被引：27

作者：

Kostjuk, Sergei V. ^{[1
]}

Vasilenko, Irina V. ^{[1
]}

Shiman, Dmitriy I. ^{[1
]}

Frolov, Alexander N. ^{[1
]}

Gaponik, Ludmila V. ^{[1
]}

机构：

[1] Belarusian State Univ, Res Inst Phys Chem Problems, Minsk 220030, BELARUS

来源：

MACROMOLECULAR SYMPOSIA | 2015年 / 349卷 / 01期

关键词：

cationic polymerization; complexes of AlCl3; highly reactive polyisobutylene; isobutylene; OLEFIN-TERMINATED POLYISOBUTYLENE; CARBOCATIONIC POLYMERIZATION; TELECHELIC POLYISOBUTYLENE; FECL3/ETHER COMPLEXES; SOLVENT POLARITY; STYRENE; ETHER; COINITIATOR; TEMPERATURE; ALCL3OBU2;

D O I：

10.1002/masy.201400016

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The cationic polymerization of isobutylene using AlCl(3)xOBu(2) and AlCl(3)xO(i)Pr(2) as co-initiators in two non-polar solvents (toluene and n-hexane) at different temperatures and monomer concentrations has been investigated. In toluene, highly reactive polyisobutylene (HR PIB) with desired low molecular weight (M-n=1,500-2,500gmol(-1)) and high exo-olefin content (85-90%) were synthesized at high monomer concentration ([M]=5.2-7.8M) and high reaction temperature (0 degrees C-20 degrees C) with both of catalytic complexes. In n-hexane, AlCl(3)xO(i)Pr(2) showed considerably higher activity and selectivity towards beta-H abstraction that AlCl(3)xOBu(2) and allowed to synthesize HR PIB with high functionality (exo >= 80%) only at -20 degrees C, but the molecular weight of synthesized PIB is slightly higher (M-n=3,500-10,000gmol(-1)) than required for the commercial application.

引用

页码：94 / 103

页数：10

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