Polyelectrolyte complex-surfactant interactions: effect of neutralization degree on viscometric behaviour in aqueous solution

Abstract

The interaction between polyelectrolytes and ionic surfactants has attracted significant interest in recent years in different areas of research. In this study, the effect of the neutralization degree alpha on the viscosimetric behaviour of (hydrolyzed polyacrylamide, AD37-poly(4-vinylpyridine), P4VP) complex in aqueous solution and in the presence of sodium dodecyl sulphate (SDS) at T = 25 A degrees C was studied. Physicochemical results show that neutralization degree has an important effect on reduced viscosities values of (AD37-P4VP-SDS) system that reveals the electrostatic and hydrophobic interactions. Indeed, these values increase with alpha, and this influence is even greater for low P4VP-high AD37 concentrations systems.