Structural chemical transformations of non-stoichiometric polyelectrolyte complexes in water-salt solutionsстатья
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Scopus
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Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Авторы:
Rogacheva V.B. ,
Ryzhikov S.V. ,
Shchors T.V. ,
Zezin A.B. ,
Kabanov V.A.
Журнал:
Polymer Science U.S.S.R.
Том:
26
Номер:
11
Год издания:
1984
Издательство:
Elsevier B.V.
Местоположение издательства:
Netherlands
Первая страница:
2748
Последняя страница:
2756
Аннотация:
A study has been made of the behaviour of non-stoichiometric polyelectrolyte complexes formed by sodium polyacrylate and linear polyethyleneimine in water-salt solutions. It is shown that phase separation is preceded by deep structural-chemical transformations occurring in particles of these complexes in solution in the presence of a low molecular electrolyte. Successive opening of interchain salt bonds is accompanied by a marked compactization of complex particles, with subsequent disproportionation into two polycomplexes differing in their composition - one approximating to the stoichiometric composition, and the other with a diminished polyethyleimine concentration compared with the initial content. Phase separation takes place as a result of conformational transitions and chemical reactions of macromolecular exchange occurring in homogeneous water-salt solutions of the nonstoichiometric polyelectrolyte complexes. © 1985.
Добавил в систему:
Зезин Александр Борисович