Micellar characteristics of the copper(II) soap plus methanol plus benzenesystem at various temperatures

The viscosity of copper(II) soaps in non-aqueous solvents of varying compos ition has been determined at four different temperatures (40, 45, 50, 55 de greesC). The viscosity of the system increases with increasing soap concent ration at all temperatures and decreases with rise in temperature. With inc rease in the number of carbon atoms in the hydrophobic chain, viscosity and cmc of the soaps increase and decrease respectively. The effect of soap co ncentration on viscosity of soap solution has been discussed in terms of Ei nstein, Thomas, Vand, Moulik and Jones-Dole equations. These studies sugges t that there is an increase in the interaction between solute-solute molecu les and a decrease in the interaction between solute-solvent molecules. Var ious parameters derived from viscometric equations confirm that two types o f micelles are formed and the behaviour of the soap changes at about 50% me thanol concentration.