New interpretation of the dependence of the conductibility of PSS and PAA polyions with the nature of the counterions

Abstract

The main object of this paper is to give a new interpretation of the dependence of the conductibility of a polyion with the nature of its counterions. For this, we analyzed in detail while comparing several models, the various physical factors influencing the mobility of a polyion (ionic condensation, hydrodynamic and electrophoretic frictions, ionic relaxation effect, and dielectric friction), and also their correlation with the ionic force and the conformation of the polyion. We showed that the specificity of the counterions appears in the hydrodynamic and electrophoretic effects via their effective radii, as in the dielectric friction effect, because of the influence of the condensed ions on the local permittivity around polyions.