Viscosity of aqueous micellar solutions of surfactants

The viscosity of aqueous micellar solutions of two long-chain surfactants, C24H43N2ClO and C21H38NCl, is studied in a concentration range of 10(-4)-10(-2) mol/L and a temperature range of 20-40A degrees C. It is established that, in the region of critical micelle concentration, the viscosity is a nonmonotonic function of concentration and has minima and maxima.