Abstract
The electrical conductances of solutions of an anionic polyelectrolyte sodium carboxymethylcellulose in acetonitrile (1) + water (2) mixed solvent media containing 0.10, 0.20, and 0.40 volume fractions of acetonitrile (v1) have been reported at 308.15 K in the presence of sodium chloride. The conductance data have been analyzed on the basis of an equation recently developed by us (J. Chem. Eng. Data, 2010, 55, 2108–2115) following the model for the electrical conductivity of salt-free polyelectrolyte solutions using the scaling description for the configuration of a polyion chain according to Dobrynin et al. (Macromolecules, 1995, 28, 1859–1871). Excellent quantitative agreement between the experimental results and those obtained using the equation developed here was observed. This provides further support in favor of the approach developed. Influences of the solvent composition and the concentration of the added salt were also examined.
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