Viscosity of Sodium Polystyrenesulfonate with Cetyltrimethylammonium Bromide in the Mixture of Methanol and Water.

Viscosity of cetyltrimethylammonium bromide (CTAB) in the presence of sodium polystyrene sulfonate (NaPSS) in methanol-water mixed solvent media has been reported at 308.15 K. The results have been analyzed on the basis of a simple model based on the scaling theory of the viscosity of polyelectrolyte solutions put forward by Plucktaveesak et al. (, , , 8166-8171). The specific viscosity data obtained here for the CTAB-NaPSS couple in mixed solvent media agree very well with the predictions of the above model. It has been established that the fraction of free counterions of the polyelectrolyte can be conveniently recovered in these complex fluids.