Effect of polymer and temperature on the critical micellar concentration of aqueous sodium dodecyl sulfate

Abstract

The critical micellar concentrations (cmc) of SDS in aqueous polyethylene glycol (M.W. 35000) solutions have been determined at different temperatures. The cmc of SDS increases with the increase in concentration of PEG and decreases with increase of temperature. The critical aggregation concentration (CAC) and polymer saturation point (PSP) decrease with increase in temperature. The effect of the increase in polymer concentration of CAC and PSP has been determined. The thermodynamic quantities associated with the PSP are computed. Intrinsic viscosity [η] of the PEG increases with increase in SDS concentration.