Physicochemical studies of 2-propanol in some micellar solutions (original) (raw)

Conductance values of sodium dodecyl sulphate and dodecyl trimethyl ammonium br. 9mide have been measured in aqueous and 2-propanol+water solutions. The measurements are carried out at 298 .15, 308.15 and 318.15 K. From ' conductivity data the values of critical micelle concentration and counterion association constant (a) are determined. The observed thermodynamic data reveals that micellisation process is favoured both energetically as ~ell as by entropy gain. 'H i'fMR data of solutions indicate that whereas 2-propanol is solubilised in the interior 'of SOS mi celles, the penetration of 2-propanol into DT AB micelles is comparatively weak.