Abstract
In the previous papers, we measured the heat of dilution of the atactic polystyrene solution and found that the interaction heat parameter between the polymer and the solvent depended on the concentration and molecular weight of the polymer.
In this paper, we measured the heats of dilution of the isotactic polystyrene-toluene and -anisole systems in order to see the effect of tacticity on the solution property. The results indicate that the isotactic-anisole system behaves similarly, but the isotactic-toluene system dissimilarly to the atactic polystyrene solutions.
