Micellization of Gemini Surfactants in Polymer Solutions

The micellization behavior of three cationic gemini surfactants, C 16 H 33 N + (CH 3 ) 2 (CH 2 ) S N + (CH 3 ) 2 C 16 H 33 , 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 (α) and the thermodynamics of micellization ΔG o m , ΔH o m , ΔS o m , 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.