Association in solutions of hydrophobically modified poly(vinyl alcohol)статья
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: 18 июля 2013 г.
Местоположение издательства:Road Town, United Kingdom
Первая страница:1059
Последняя страница:1064
Аннотация:A new hydrophobically modified poly(vinyl alcohol) with carboxyalkyl radicals of the general structure -(CH2)(n)COOH (n = 4, 7, 10) as pendant groups attached to the backbone via ether bonds was synthesized by the chemical modification of poly(vinyl alcohol). The content of modified units varied from 2.5 to 10 mol %. The structure of the polymers was confirmed by H-1 and C-13 NMR and IR spectroscopy; molecular mass characteristics were determined by gel permeation chromatography. The association in aqueous polymer solutions was demonstrated by dynamic light scattering and fluorescence spectroscopy using pyrene as a probe. It was shown that the hydrophobic association occurs below the overlap concentration c* to form aggregates ranging in size from 100 to 200 nm. The critical aggregation concentration decreased with increase in the length of a hydrophobic chain and in the degree of polymer modification.