ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 46, Number 6
JKCSEZ 46(6)
December 20, 2002 

The critical micelle concentration(CMC) and the counterion binding constant(B) for the mixed micel-lization of sodium n-octanoate(SOC) with n-octylammonium chloride(OAC) were determined as a function of the overall mole fraction of SOC(α₁). Various thermodynamic parameters(X_i, γ_i, C_i, a_i^M , and ΔH_mix) for the mixed micellization of the SOC/OAC systems have been calculated and analyzed by means of the equations derived from the nonideal mixed micellar model. The results show that there are great deviations from the ideal behavior for the mixed micellization of these systems. And other thermodynamic parameters( △G˚_m,△H˚_m,and △S˚_m) associated with the micellization of SOC,OAC, and their mixture(α₁=0.5) have been also estimated from the temperature dependence of CMC and B values, and the significance of these parameters and their relation to the theory of the micelle formation have been considered and analyzed by comparing each other.