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ABSTRACT The concentration dependences of three χ parameters (thermodynamic interaction parameters of solvent 1—2, solvent 1-polymer, and solvent 2-polymer; χ12, χ13, and χ23, respectively)

were studied for developing a theory of the two-phase equilibrium of a quasi-ternary system which consists of multicomponent polymers and a binary solvent mixture. χ12, χ13, and χ23 were

defined by where χ120, χ130, and χ230 are tne parameters independent of the total polymer concentration _vp_ and are dependent on the temperature only, and _p_12,1, _p_13,1, and _p_23,1 are

the concentration dependent parameters. Computer experiments on solutions of an original polymer with the Schulz–Zimm type molecular weight distribution (the ratio of weight- to

number-average molar volume of the polymer to the solvents _Xw_0/_Xn_0=2.0 and _Xw_0=300) were carried out to study the effects of concentration dependent parameters on the two phase

equilibrium characteristics. Partition coefficient σ, phase volume ratio _R_, and polymer volume fraction in polymer rich phase _v_p(2) increase with an increase in _p_13,1 and _p_23,1 and

yield maximum near _p_12,1=−0.2. The effects of the concentration dependence of χ-parameter on σ, _R_, and _v_p(2) decrease in the following order: _p_23,1>_P_13,1>_p_12,1. SIMILAR

CONTENT BEING VIEWED BY OTHERS THERMODYNAMIC STUDIES OF SOLUTE–SOLUTE AND SOLUTE–SOLVENT INTERACTIONS IN TERNARY AQUEOUS SYSTEMS CONTAINING {BETAINE + PEGDME250} AND {BETAINE + K3PO4 OR

K2HPO4} AT 298.15 K Article Open access 18 October 2023 EXPERIMENTAL AND COMPUTATIONAL INSIGHT IN MOLECULAR INTERACTIONS OF TERNARY MIXTURES OF ETHYLENEGLYCOLDIACETATE+ 4-METHYLACETOPHENONE 

+ DIBUTYLAMINE AT _T_ = (298.15 TO 318.15) K Article Open access 18 March 2025 A NEW METHOD BASED ON BINARY MIXTURE CONCEPT FOR PREDICTION OF IONIC LIQUIDS CRITICAL PROPERTIES USING

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and Y. Miyazaki, _Polym. J._, 14, 355 (1982). Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Fundamental Research Laboratory of Fibers and Fiber-Forming Polymers, Asahi

Chemical Industry Co., Ltd., Shigenobu Matsuda Authors * Shigenobu Matsuda View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS

Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Matsuda, S. Phase Equilibria of Quasi-Ternary Systems Consisting of Multicomponent Polymers in a Binary Solvent Mixture V.

Effects of Concentration Dependence of Thermodynamic Interaction Parameters. _Polym J_ 18, 993–1016 (1986). https://doi.org/10.1295/polymj.18.993 Download citation * Issue Date: 01 December

1986 * DOI: https://doi.org/10.1295/polymj.18.993 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a shareable link is

not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative KEYWORDS * Concentration Dependent Parameter * Thermodynamic

Interaction Parameter * Quasi-Ternary System * Binary Solvent Mixture * Partition Coefficient * Phase Volume Ratio