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Double stimuli-responsive behavior of graft copolymer with polyimide backbone and poly(N,N-dimethylaminoethyl methacrylate) side chainsстатья
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: 11 ноября 2019 г.
- Авторы: Filippov A.P., Belyaeva E.V., Zakharova N.V., Sasina A.S., Ilgach D.M., Meleshko T.K., Yakimansky A.V.
- Журнал: Colloid and Polymer Science
- Том: 293
- Номер: 2
- Год издания: 2015
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 555
- Последняя страница: 565
- DOI: 10.1007/s00396-014-3441-3
- Аннотация: Comblike block copolymer having a polyimide backbone and poly(N,N-dimethylaminoethyl methacrylate) side chains, i.e., PI-g-PDMAEMA, was prepared through the "grafting from" method using (N,N-dimethylaminoethyl methacrylate) polymerization on a polyimide multicenter macroinitiator by atom transfer radical polymerization (ATRP) mechanism. Its molar mass characteristics were determined in chloroform solution using hydrodynamic methods. PI-g-PDMAEMA is a relatively loose molecular brush with the substitution degree z = 0.44. The behavior of PI-g-PDMAEMA in aqueous solutions at a concentration 0.015 g cm(-3) was studied by light scattering within a pH interval from 2.1 to 12.4. The temperature dependences of light scattering intensity and hydrodynamic sizes of dissolved species were obtained. Synthesized copolymer shows clearly temperature and pH responsiveness. PI-g-PDMAEMA is thermo-sensitive at pH a parts per thousand yenaEuro parts per thousand 8.9. The pH growth is accompanied by a decrease in the phase transition temperature and an increase in the width of the phase transition interval and hydrodynamic radii of the micellar aggregates and large loose aggregates.
- Добавил в систему: Якиманский Александр Вадимович