Micellization of Gemini Surfactants in Polymer Solutions

The micellization behavior of three cationic gemini surfactants, C16H33N+(CH3)(2)(CH2)(s)N+(CH3)(2)C16H33, 2Br(-) (s = 4, 6, 10) have been studied in the presence of 1% (w/v) and 5% (w/v) polyethylene glycol-600 (PEG-600) by conductivity measurements at 300-320 K. From the conductivity data the critical micelle concentration, the degree of counterion ionization (alpha) and the thermodynamics of micellization Delta G(m)(o), Delta H-m(o), Delta S-m(o), of the gemini surfactants have been determined. The micellar parameters show a significant dependence on the spacer length and as well as amount of polymer.