CATIONIC POLYMERIZATION OF HYDROCARBON MONOMERS UNDER THE EFFECT OF COMPLEXES OF ACYL HALIDES WITH LEWIS-ACIDS .3. POLYMER-CHAIN INITIATION AND BREAKING IN HEXANE AT -78-DEGREES-C

被引：12

作者：

NESMELOV, AI ^{[1
]}

ORLINKOV, AV ^{[1
]}

MURACHEV, VB ^{[1
]}

AKHREM, IS ^{[1
]}

BYRIKHIN, VS ^{[1
]}

ZUBOV, VP ^{[1
]}

机构：

[1] MV LOMONOSOV PRECIS CHEM TECHNOL INST,MOSCOW,USSR

来源：

BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR DIVISION OF CHEMICAL SCIENCE | 1990年 / 39卷 / 11期

关键词：

D O I：

10.1007/BF00958835

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymerization of isobutylene under the effect of the AcBr.2AlBr3 (Ac-2) complex in hexane at -78-degrees-C has some characteristics of "living" polymerization; however, in contrast to truly "living" polymerization, the process is characterized by high values of M(w)/M(n) and continuously occurring chain breaking. The steady-state concentration of active polymerization sites is established at the very beginning of the process; the dependence of the number of active sites on the starting concentration of Ac-2 is in agreement with the hypothesis concerning initiation by free acyl cations. The features of polymerization under the effect of the AcBr.AlBr3 (Ac-1) complex are characteristic of cationic polymerization processes.

引用

页码：2266 / 2271

页数：6

共 11 条

[1]

AKHREM IS, 1985, DOKL AKAD NAUK SSSR+, V284, P627

[2]

FAYST R, 1986, POLYM B, V15, P317

[3]

HIGASHIMURA T, 1984, J POLYM SCI PC, V25, P3173

[4]

HRABAK F, 1982, MAKROMOL CHEM-RAPID, V3, P891