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A study of the adsorption properties of ring-shaped macromolecules in the critical regionстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 9 марта 2017 г.
- Авторы: Blagodatskikh IV, Gorshkov A.V.
- Журнал: VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A & SERIYA B
- Том: 39
- Номер: 10
- Год издания: 1997
- Первая страница: 1681
- Последняя страница: 1689
- Аннотация: The behavior of ring-shaped macromolecules at the adsorption critical point and in its vicinity was studied experimentally. The cyclic fractions with molecular masses 25 000, 77 000, and 126 000 were isolated from polystyrene samples obtained by the condensation of bifunctional living chains under high dilution and composed of cyclic and linear macromolecules. The critical conditions for linear polystyrene were determined using silica gel columns with wide and narrow pores. In the critical region and in its vicinity, where weak exclusion and adsorption effects are observed, the behavior of macrocycles was studied. Selective separation of linear and cyclic macromolecules of the same size was achieved when molecular masses were too high. It is shown that the macrocycles are more strongly retained than the corresponding linear chains, and the dependences of the distribution coefficients on the size of macrocycles are nonmonotonic. Experimental data are compared with the theoretical predictions for the Gaussian coils and the coils with volume interactions.
- Добавил в систему: Благодатских Инэса Васильевна