Thermodynamics and Structure of Micelles in Aqueous Solutions of SODIUM DECYL SULFATE (cas 142-87-0) in the Region of the Third Critical Micelle Concentration

Add time:09/30/2019    Source:infona.pl

Using data on heat capacity of SODIUM DECYL SULFATE (cas 142-87-0) solutions near the third critical micelle concentration, obtained earlier via high-precision scanning calorimetry, the temperature dependences are calculated for the thermodynamic functions of the corresponding micellar transition and the components of its Gibbs free energy. It is shown that the considered intermicellar transition, interpreted as the micellar shape transforming from cylindrical to lamellar as the concentration grows, occurs at an equilibrium molality of 0.33 and a temperature of 323 K. Correlations between the thermodynamic functions of the transition with structural changes in the micelles and the key micellar parameters are discussed.

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