Abstract

Density and viscosity measurements of Stearalkonium chloride (SAC) in methanol at different concentration show that there is marked change in aggregation at critical micellar concentration (CMC). The results obtained from density and viscosity methods have been satisfactorily explained by well-known equations with their parameters. Treatment of data obtained from density and viscosity measurement showed that there is significant interaction between SAC and methanol molecules in dilute solutions and SAC molecules do not aggregate appreciably below the CMC.