The application of equation-of-state theories to polar-nonpolar liquid mixtures

Equation-of-state theories have been applied with great success to the description of the qualitative details of the phase behavior of polymer solutions. In particular, the LCST behavior, exhibited by most polymer solutions, can only be described by theories of this type. The theories, in their simp...

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Bibliographic Details
Published in:The Journal of supercritical fluids 1991, Vol.4 (3), p.152-159
Main Author: Dee, Gregory T.
Format: Article
Language:English
Subjects:
equation-of-state
phase diagram
polar-nonpolar liquids
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Summary:Equation-of-state theories have been applied with great success to the description of the qualitative details of the phase behavior of polymer solutions. In particular, the LCST behavior, exhibited by most polymer solutions, can only be described by theories of this type. The theories, in their simplest form, assume random mixing and hence are best applied to mixtures of nonpolar molecules. To model these systems, we make use of the strong short-range order of the polar component and assume that the basic entity that mixes with the nonpolar component reflects this short-range order. The assumption enables us to preserve the simple assumptions of the model, in particular, the assumption that random mixing occurs. The model is applied to the study of water-cyclohexane and polystyrene-cyclohexane-water systems.
ISSN:0896-8446
1872-8162
DOI:10.1016/0896-8446(91)90002-N