Abstract
The effect of the lengths of the alkyl radicals of sodium alkyl sulfates (decyl sulfate, dodecyl sulfate, and tetradecyl sulfate) on the association with partially quaternized poly(4-vinylpyridine) in wateralcohol solutions of different compositions is studied via potentiometry, viscometry, spectrophotometry, and dynamic light scattering. The critical concentrations of surfactant association, hydrodynamic radii, and molecular-mass characteristics of polyelectrolyte-surfactant associates are determined. The parameters of the surfactant-polymer cooperative association and the dissociation constants of the complexes are calculated. An increase in the lengths of the alkyl radicals results in enhanced associative interactions in the polyelectrolyte-surfactant system at ethanol concentrations below 34 vol %. In solutions with higher alcohol concentrations, the composition of the solvent plays the decisive role in polymer-colloid complexation.
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Original Russian Text © S.V. Shilova, A.N. Bezrukov, A.Ya. Tret’yakova, M.A. Voronin, L.Ya. Zakharova, V.P. Barabanov, 2012, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2012, Vol. 54, No. 1, pp. 22–29.
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Shilova, S.V., Bezrukov, A.N., Tret’yakova, A.Y. et al. Effect of the length of surfactant hydrocarbon radicals on the association of cationic polyelectrolytes with alkyl sulfates in water-alcohol solutions. Polym. Sci. Ser. A 54, 19–25 (2012). https://doi.org/10.1134/S0965545X12010075
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DOI: https://doi.org/10.1134/S0965545X12010075