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Anionic polymerization of N,N-dimethylacrylamide with thienyllithium and synthesis of block copolymers of isobutylene and N,N-dimethylacrylamide by site transformation of chain endsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Martínez-Castro N., Zhang M., Pergushov D.V., Müller A.H.E
- Журнал: Designed Monomers and Polymers
- Том: 9
- Номер: 1
- Год издания: 2006
- Издательство: V S P
- Местоположение издательства: Netherlands
- Первая страница: 63
- Последняя страница: 79
- DOI: 10.1163/156855506775526151
- Аннотация: The anionic polymerization of N,N-dimethylacrylamide (DMAAm) was carried out in THF with a binary initiator system prepared from thienyllithium and the Lewis acids triethylaluminium (Et3Al), diethylzinc (Et2Zn) or triethylborane (Et3B). Polymerizations proceeded in a homogeneous manner and gave polymers having controlled molecular weights. However, in presence of alkoxides the polymerization results in polymers insoluble in THF even using Et3Al. A synthetic route for the synthesis of polyisobutylene-b-PDMAAm was developed by combining living carbocationic and anionic polymerizations. Thiophene end-capped polyisobutylene (PIB-T), prepared by cationic polymerization, was metalated with n-butyllithium in THF at –40 °C. The resulting stable macrocarbanion (PIB-T-, Li+), in conjunction with Lewis acids, was used to initiate the living anionic polymerization of DMAAm, resulting in the new amphiphilic block copolymer PIB-b-PDMAAm. Their molecular structure was characterized by size exclusion and adsorption chromatography and NMR and their micellisation in aqueous solution was characterized by fluorometry and dynamic light scattering.
- Добавил в систему: Пергушов Дмитрий Владимирович