POLYMERIZATION OF METHYL-METHACRYLATE BY ION-PAIRS

被引：4

作者：

CHAPLIN, RP

YADDEHIGE, S

CHING, W

机构：

[1] School of Chemical Technology, University of New South Wales, Kensington, NSW 2033

来源：

EUROPEAN POLYMER JOURNAL | 1979年 / 15卷 / 01期

关键词：

D O I：

10.1016/0014-3057(79)90240-4

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 reactions of the polymethylmethacrylate anion have been investigated at 200 K and 250 K in both THF and 9/1 toluene/THF. Sodium-α methyl styrene tetramer and fluorenyl sodium were used as initiators. Only ion pair reactions were investigated. The rate constant of monomer addition to the ion pair at 200 K was determined to be 80 ± 6 M-1 sec-1. At 250 K in the presence of excess monomer, the poly MMA anion reacts with the monomer vinyl function and the monomer ester function at comparable rates. Once fully reacted, the poly MMA anion terminates very slowly in THF at 250 K by an intermolecular mechanism. This rate of termination is enhanced in the toluene/THF system. No evidence was found for different reaction mechanisms for the two initiators. © 1979.

引用

页码：5 / 10

页数：6

共 18 条

[1] POLYMERIZATION OF METHYL-METHACRYLATE BY ANIONS .2. INFLUENCE OF INITIATION PROCEDURES ON KINETICS OF SUBSEQUENT POLYMERIZATION IN TETRAHYDROFURAN-TOLUENE SOLUTION INITIATED BY DISODIUM SALT OF TETRAMERIC ALPHA-METHYL STYRENE [J].