Cationic Polymerization of Isobutylene and C4 Mixed Feed Using Complexes of Lewis Acids with Ethers: A Comparative Study

被引：15
作者：
Shiman, Dmitriy I. [1 ]
Berezianko, Ivan A. [1 ,2 ]
Vasilenko, Irina V. [1 ]
Kostjuk, Sergei V. [1 ,2 ,3 ]
机构：
[1] Belarusian State Univ, Res Inst Phys Chem Problems, 14 Leningradskaya St, Minsk 220006, BELARUS
[2] Belarusian State Univ, Dept Chem, 14 Leningradskaya St, Minsk 220006, BELARUS
[3] Sechenov First Moscow State Med Univ, Inst Regenerat Med, 8-2 Trubetskaya St, Moscow 119991, Russia
来源：
CHINESE JOURNAL OF POLYMER SCIENCE | 2019年 / 37卷 / 09期
关键词：
Cationic polymerization; Isobutylene; C-4 mixed feed; Highly reactive polyisobutylene; HIGHLY REACTIVE POLYISOBUTYLENES; OLEFIN-TERMINATED POLYISOBUTYLENE; CATALYTIC CHAIN TRANSFER; ALCL3/ETHER COMPLEXES; FECL3/ETHER COMPLEXES; DIISOPROPYL ETHER; IONIC LIQUIDS; TEMPERATURE; HEXANES;
D O I：
10.1007/s10118-019-2290-4
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 C-4 mixed feed and isobutylene co-initiated by AlCl(3)xO(i)Pt(2), (i)BuAlCl(2)xnO(i)Pr(2), and [emim]Cl-FeCl(3)xnO(i)Pr(2) ([emim]Cl: 1-ethyl-3-methylimidazolium chloride) has been investigated. AlCl(3)xO(i)Pr(2) co-initiated cationic polymerization of C-4 mixed feed proceeds at a lower rate than polymerization of isobutylene affording polymers with higher molecular weight. Complexes of (BuAlCl2)-Bu-i with diisopropyl ether of different compositions are more suitable co-initiators than AlCl(3)xO(i)Pr(2) for the synthesis of highly reactive polyisobutylene (HR PIB) from C-4 mixed feed due to their higher activity in the polymerization as well as possibility to prepare polyisobutylenes with lower molecular weight and higher content of exo-olefin end groups. However, (BuAlCl2)-Bu-i needs activating via addition of external water (initiator) and/or interaction with salts hydrates in order to increase the reaction rate and the saturated monomer conversion. [Emim]Cl-FeCl3/(Pr2O)-Pr-i is a quite promising catalyst for the preparation of HR PIB with high exo-olefin end group content (> 80%) and relatively low polydispersity (M-w/M-n < 2.8) via cationic polymerization of C-4 mixed feed. The sonication of reaction mixture in case of using [emim]Cl-FeCl3 allowed increasing the reaction rate and decreasing the molecular weight.
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页码：891 / 897
页数：7
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