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혼합용매중에서의 공중합체의 부분체적과 용액공중합계의 체적수축인자
馬永大,韓春暎 단국대학교 1986 論文集 Vol.20 No.-
On basis of the van Laar-Scachard type equation of mixing, formulas were developed for the partial molar volum of a copolymer (or a mixture of two polymers) in a mixture of three solvents and for the volume contraction factor in the solution-copolymerization of two monomers and one solvent. In order to test the validity of proposed formulas for the partial molar volume in the dilute limit of zero polymer concentration V~^o_p, density measurements were carried out on styreneethyl acrylate and methyl methacrylate-vinyl acetate copolymers dissolved in the relevant monomer(s) and solvent(s). The values of the ten parameters necessary to compute V~^o_p were determined for each system, and some comments have been made on the individual parameter values. The predicted values of V~^o_p were in good agreement with those directly measured. Based on the result, numerical expressions for the volume contraction factors for the incipient solution-copolymerizations of the two monomer pairs were derived as a function of concentration of the monomers.