POLYMERIZATION OF CARBAZOLYL-CONTAINING EPOXIDES BY ACTIVATED MONOMER MECHANISM

被引:20
作者
GRAZULEVICIUS, JV
KUBLICKAS, R
机构
[1] Department of Organic Technology, Kaunas University of Technology, 233028 Kaunas
关键词
Activated Monomer Mechanism - Carbazolyl-Containing Epoxide Polymerization - Carbazolyl-Containing Oligoethers - Dibromocarbazolyl-Containing Oligomers - Organic Photoconductors;
D O I
10.1016/0014-3057(91)90244-I
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Cationic polymerization of 3,6-dibromo-9-(2,3-epoxypropyl)carbazole and 9-(2,3-epoxypropyl)carbazole in the presence of hydroxyl-containing compounds has been studied. It has been established that, at a high enough ratio of the concentrations of a hydroxyl-containing compound and monomer, polymerization occurs by an activated monomer mechanism. Linear increase of molecular weight of polymerization products with conversion and hydroxyl functionality of ca 2 in the obtained oligomer are characteristic features of activated monomer polymerization observed in this work. Carbazolyl-containing oligomers of comparatively wide range of molecular weight and glass transition temperature were obtained. The low glass transition of the oligomers is explained by the presence of a flexible oxyalkylene fragment into the backbone of the oligomer as well as by the orderly distribution of elementary units in the main chain.
引用
收藏
页码:1411 / 1416
页数:6
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