Abstract
Theoretical equations of spinodal and neutral equilibrium conditions were derived, based on modified Flory–Huggins theory and without further approximation, for quasi-ternary solutions consisting of a multicomponent polymer 1/multicomponent polymer 2/single solvent. Numerous and systematic computer experiments clarified the effects of three thermodynamic interaction parameters between solvent–polymer 1 (χ01), solvent-polymer 2 (χ02), and polymer 1-polymer 2 (χ12), the weight average degrees of polymerization of original polymers 1 and 2 (Xw0 and Yw0) and the breadth of the molecular weight distribution of original polymers (Xw0/Xn0 and Yw0/Yn0; Xn0 and Yn0 are the number-average degree of polymerization, X and Y, of the original polymers) on the spinodal curve and critical solution points. Here, the possible compositional dependence of three χ parameters were not considered.
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Kamide, K., Matsuda, S. & Shirataki, H. Phase Equilibria of Quasi-Ternary Systems Consisting of Multicomponent Polymers 1 and 2 in a Single Solvent I. Spinodal Curve and Critical Solution Point. Polym J 20, 949–963 (1988). https://doi.org/10.1295/polymj.20.949
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DOI: https://doi.org/10.1295/polymj.20.949