Abstract
A study was made of the effect of NaCl on the counterion activity coefficient in solutions of acidic polysaccharide sodium salts. The counterion activity coefficient in the sodium salt solutions of polyuronic acids was shown to be determined by electrostatic interactions only. Consequently it can be supposed that the counterion-polyion interaction is also of an electrostatic nature.
A method was proposed for determining the distribution patterns of nonionogenic groups along the polyelectrolyte chain. The structural transition ofχ-carrageenan, depending on NaCl concentration, was found to be accompanied by a nonelectrostatic binding of sodium ions by the polysaccharide.
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II: Berth, G., H. Anger, I. G. Piaschina, E. E. Braudo, V. B. Tolstoguzov, Carbohydr. Polym.2, 1 (1982).
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Yuryev, V.P., Braudo, E.E. & Tolstoguzov, V.B. Structural study of the solutions of acidic polysaccharides. Colloid & Polymer Sci 261, 210–214 (1983). https://doi.org/10.1007/BF01469665
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DOI: https://doi.org/10.1007/BF01469665