Polymerization of carbazolyl-containing epoxides by activated monomer mechanism

✍ Scribed by Juozas Vidas Graẑulevičius; Rimantas Kublickas

• Book ID: 103072420
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 408 KB
• Volume: 27
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(91)90244-i

✦ Synopsis

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.