Volumetric Properties of Poly (Vinyl Alcohol, Vinyl Sulfate Ester Salt) Polyelectrolytes in Salt Free Aqueous Solutions

Sharp break points in the apparent molar volume and compressibility functions of poly (vinyl alcohol co-vinyl sulfate sodium salt) copolymers were found in the 0.01-0.03 molal-segment concentration range in aqueous solution. Both apparent molar volume and compressibility increase linearly with conce...

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Bibliographic Details
Published inJournal of dispersion science and technology Vol. 24; no. 1; pp. 43 - 51
Main Authors Horváth-Szabó, Géza, Nagy, Miklós, Høiland, Harald, Maham, Yadollah
Format Journal Article
LanguageEnglish
Published Philadelphia, PA Taylor & Francis Group 02.01.2003
Taylor & Francis
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Summary:Sharp break points in the apparent molar volume and compressibility functions of poly (vinyl alcohol co-vinyl sulfate sodium salt) copolymers were found in the 0.01-0.03 molal-segment concentration range in aqueous solution. Both apparent molar volume and compressibility increase linearly with concentration below the break point, while they show saturation type characteristic above the break point. The position of break point is independent of the vinyl-sulfate/(vinyl-sulfate and vinyl-alcohol) group-ratio of the polyelectrolyte. An association process between the individual polyelectrolyte molecules is suggested for the interpretation of break points. The partial molar volumes at infinite dilution depend linearly on the vinyl sulfate sodium salt group content. The partial molar volume contribution of (vinyl sulfate sodium salt)-group and (vinyl alcohol)-group were determined from concentration ranges corresponding to both the associated and non-associated state of the polyelectrolyte salt.
ISSN:0193-2691
1532-2351
DOI:10.1081/DIS-120017942