Journal of Chemical and Engineering Data, Vol.55, No.6, 2284-2288, 2010
Microcalorimetric Studies on the Critical Micelle Concentration and Thermodynamic Functions of the Poly(oxyethylene) Lauryl Ether and Poly(oxyethylene glycol) Octylphenyl Ether in N,N-Dimethylformamide plus Long-Chain Alcohol Systems at 298.15 K
The power time curves of the micelle formation process are determined for the nonionic surfactants (Brij-35 and TX-100) in dimethylformamide (DMF) + long-chain alcohol systems by titration microcalorimetry. From the power time curves, the critical micelle concentration (cmc) and the Delta H(m)(theta) are obtained with Delta G(m)(theta) and Delta S(m)(theta) calculated. For this system, the relationships among the alcohol carbon number, the alcohol concentration with cmc, and the thermodynamic functions are discussed.