Douglas, J.
, Dudowicz, J.
and Karl, F.
(2015),
Cosolvency and cononsolvency explained in terms of a Flory-Huggins type theory, Journal of Chemical Physics
(Accessed September 23, 2023)
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Cosolvency and cononsolvency explained in terms of a Flory-Huggins type theory
Published
Author(s)
, Jacek Dudowicz, Freed Karl
Abstract
Standard classic Flory-Huggins (FH) theory is employed to describe the enigmatic cosolvency and co-nonsolvency phenomena for systems of polymers dissolved in mixed solvents. In particular, phase boundaries (spinodals) are calculated for solutions of homopolymers B in single and binary mixtures of small molecule liquids A and C. The miscibility (or immiscibility) patterns for the ternary systems are classified in terms of the FH binary interaction parameters {χαβ} and the ratio r = φA/φC of the concentrations φA and φC of the two solvents. The trends in miscibility are compared to those observed for random copolymer (AxC1 x) homopolymer (B) blends and for A/B/C solutions of polymers B in liquid mixtures of small molecule A and C that naturally associate into polymeric clusters {ApCq}i,(i = 1, 2, · · ·, ∞).Citation
Journal of Chemical Physics
Pub Type
Journals
Keywords
phase separation, polymer in mixed solvents, co-solvency, co-non-solvency, block copolymers, Flory-Huggins theory
Citation
Created October 7, 2015, Updated January 27, 2020