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Cationic copolymerization of tetrahydrofuran with ethylene oxide in the presence of diols: Composition, microstructure, and properties of copolymers

โœ Scribed by Melania Bednarek; Przemyslaw Kubisa

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
184 KB
Volume
37
Category
Article
ISSN
0887-624X

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โœฆ Synopsis

Cationic copolymerization of tetrahydrofuran (THF) with ethylene oxide (EO) in the presence of diols leads to dihydroxy terminated telechelic copolymers. In the present article the influence of copolymerization conditions on the copolymer structure was studied in view of conclusions derived from studies of copolymerization kinetics and mechanism. It was shown that according to established copolymerization mechanism, the number average molecular weights increase linearly with conversion up to M n ะฅ 2500, hydroxyl end groups are bound exclusively to EO units and copolymers are composed of [EO]-[THF] y segments. Microstructure of copolymers may be to some extent regulated by changing reaction conditions. Some physical properties of copolymers also were studied.

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