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Relation between miscibility and solvent quality in solutions of polymers solvated in mixed solvents

Published

Author(s)

Jack F. Douglas, Jacek Dudowicz, Karl Freed

Abstract

A recently developed Flory-Huggins type theory for the competitive solvation of a polymer B by two small-molecule liquids A and C is utilized to examine the nature of the phase boundaries for this general class of ternary solutions (with strong associative interactions between the polymer and the solvents) and to quantify how solvent composition affects polymer miscibility. In particular, we evaluate the boundaries for phase stability (spinodal curves) and the second osmotic virial coefficient B2 as functions of temperature T and the relative composition of the pure solvent in determining the miscibility patterns of the ternary A/B/C polymer solutions with both associative and van der Waals interactions.mixtures in osmotic equilibrium with the ternary solution. Special attention is focused on illustrating the complementary role of the spinodals curves and the plots of second osmotic virial coefficient in determining the miscibility patterns of the ternary A/B/C polymer solutions with both associative and van der Waals interactions.
Citation
Macromolecular Rapid Communications

Citation

Douglas, J. , Dudowicz, J. and Freed, K. (2016), Relation between miscibility and solvent quality in solutions of polymers solvated in mixed solvents, Macromolecular Rapid Communications (Accessed June 13, 2024)

Issues

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Created May 19, 2016, Updated April 23, 2020