The Viscosity of Polyelectrolytes: Influence of counterion and solvent type

30 January 2024, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We study the viscosity of polystyrene sulfonate with sodium and tetrabutylammonium counterions in aqueous and organic solvent media. We find that at low concentrations, the Fuoss law (ηsp ∼ c1/2) is approximately obeyed, but at higher concentrations an exponential dependence on the polymer volume fraction sets in. These findings are discussed in terms of Fujita’s free volume theory.


Free Volume


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