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The effect of charge and length of a blocking polycation on phase separation in aqueous salt-containing solutions of nonstoichiometric polyelectrolyte complexesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Дата последнего поиска статьи во внешних источниках: 18 декабря 2013 г.
- Авторы: Izumrudov V.A., Lim S.Kh
- Журнал: Vysokomolekulyarnye soedineniya
- Том: 40
- Номер: 3
- Год издания: 1998
- Первая страница: 459
- Последняя страница: 465
- Аннотация: The behavior of water-soluble nonstoichiometric polyelectrolyte complexes containing lyophilizing polymethacrylate anions and blocking poly(N-ethyl-4-vinylpyridinium) cations in sodium chloride solutions was studied by the methods of turbidimetry, velocity sedimentation, and fluorescence quenching. As the degree of polymerization of the polycation is decreased, the compaction of complex particles and phase separation are prevented, whereas decreasing the charge of the polycation leads to the collapse of complex particles and assists in phase separation. According to proposed mechanism for the phase transition, the driving force of this transition is provided by the collapse of particles of the nonstoichiometric polyelectrolyte complex, which leads to an increase in the local concentration of free carboxyl groups of polyanions and their low-molecular-mass counterions.
- Добавил в систему: Изумрудов Владимир Алексеевич