|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
Synthesis in aqueous media of poly(ethylene phosphoric acids) by mild thermolysis of homopolymers and block copolymers based on tert -butyl ethylene phosphateстатья
Статья опубликована в высокорейтинговом журнале
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: 3 ноября 2018 г.
- Авторы: Nifant'ev Ilya E., Shlyakhtin Andrey V., Bagrov Vladimir V., Komarov Pavel D., Tavtorkin Alexander N., Minyaev Mikhail E., Kosarev Maxim A., Ivchenko Pavel V.
- Журнал: European Polymer Journal
- Том: 106
- Год издания: 2018
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 249
- Последняя страница: 256
- DOI: 10.1016/j.eurpolymj.2018.07.034
- Аннотация: Poly(ethylene phosphoric acid)s (PEPA)s of different compositions, namely homopolymers, and diblock and triblock copolymers containing poly(ethylene glycol) monomethyl ether, L-lactide, and ε-caprolactone blocks, can be quantitatively obtained by mild thermolysis of polymers based on tert-butyl ethylene phosphate in aqueous media at 80 °С. Thermolysis of poly(tert-butyl ethylene phosphate) in the presence of sodium acetate gave a PEPA with a narrow molecular weight distribution (Ð = 1.10). The salt-like reaction product can be concentrated without the formation of three-dimensional gels. All starting poly(tert-butyl ethylene phosphate) containing homopolymers and block copolymers were effectively prepared with phenolate–Mg catalysts, i.e., [(ВНТ)MgBu(THF)]2 and [(ВНТ)Mg(OBn)(THF)]2 (BHT = 2,6-di-tert-butyl-4-methylphenolate). In the synthesis of polyphosphate–polyester block copolymers, the polyphosphate macromonomer inhibits further polymerization of ε-caprolactone. We therefore failed to obtain a copolymer BnO(tBuOEP)n-b-(εCL)mH using a coordination Mg catalyst.
- Добавил в систему: Нифантьев Илья Эдуардович