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The effects of charge density and concentration on the composition of polyelectrolyte complexes

Vishalakshi, B and Ghosh, S and Kalpagam, V (1993) The effects of charge density and concentration on the composition of polyelectrolyte complexes. In: Polymer, 34 (15). pp. 3270-3275.

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Official URL: http://dx.doi.org/10.1016/0032-3861(93)90401-U

Abstract

Polyelectrolyte complex formation involving carboxymethylcellulose and quaternized poly(vinylpyridine) as the polyions has been studied using viscosity and u.v. spectroscopic methods. The influence of charge density and molecular weight of two polycations on the composition of the complex has been investigated at two different concentrations. The charge density of the polycation is found to have different influences on the composition at different concentrations. The molecular weight of the polycation and the location of the ionic site on the polycation do not show any effect on the composition. A drastic increase in the viscosity of the polyion mixture containing quaternized poly(2-vinylpyridine) in the non-stoichiometric ratio shows evidence for the existence of the soluble polyelectrolyte complex. The results are analysed on the basis of the relative extension of the polyelectrolyte chains.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: polyelectrolyte complex; carboxymethylcellulose; poly(vinylpyridine); charge density; chain extension; soluble polyelectrolyte complex
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 10 Mar 2011 06:46
Last Modified: 10 Mar 2011 06:46
URI: http://eprints.iisc.ernet.in/id/eprint/35932

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