Polymerization of carbazolyl-containing epoxides by activated monomer mechanism

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, polymeriza...

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Bibliographic Details
Published in:European polymer journal 1991, Vol.27 (12), p.1411-1416
Main Authors: Graẑulevičius, Juozas Vidas, Kublickas, Rimantas
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary: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.
ISSN:0014-3057
1873-1945
DOI:10.1016/0014-3057(91)90244-I