Ultrasonic and Viscometric Studies of the Behaviour of Cetyltrimethyl Ammonium Bromide in Aqueous Polyacrylamide at Different Temperatures

Abstract

Polymer-surfactant interaction between aqueous cetyltrimethyl-ammonium bromide and water soluble polyacrylamide has been investigated over wide range of cetyltrimethyl ammonium bromide concentration at 303 K by using ultrasonic measurement at 2 MHz frequency and also by viscometric study. Ultrasonic results show clear and well defined break at 0.90 mM as a critical aggregation concentration and at 0.190 mM as polymer saturation point. Intrinsic viscosity of polymer-surfactant solution was determined in presence of various amounts of surfactants. It was observed that values increase as the temperature of the system increases, indicating increase in solvent power and solubility of polyacryamide.