Abstract
On the basis of a simple and unified phenomenological method for treating the excess volume of mixing in multicomponent systems, formulas were developed for the partial molar volume of a copolymer (or a mixture of two polymers) in a mixture of two solvents and for the volume contraction factor in the bulk-copolymerization of two monomers. The possible dependence of the “net” volume of a copolymer on its primary structure was taken into account. The proposed formulas were partly checked against some experimental data, and found satisfactory. The previously proposed formulas for the copolymerization contraction factor seem to be less generally applicable.
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