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Phase behaviors of binary polymer solutions: The extended lattice fluid model
Author(s) -
Jang Jeong Gyu,
Bae Young Chan
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981107)70:6<1143::aid-app11>3.0.co;2-0
Subject(s) - lower critical solution temperature , thermodynamics , polymer , binary number , lattice (music) , solvent , materials science , lattice model (finance) , statistical physics , binary system , physics , chemistry , mathematics , organic chemistry , copolymer , arithmetic , acoustics , composite material
The generalized lattice–fluid (GLF) model is extended to predict phase behaviors of polymer/solvent systems. The GLF model gives some difficulties in describing liquid–liquid equilibria (LLE) of binary polymer solution systems due to general assumptions on its derivation. An extended lattice–fluid (ELF) model is proposed by introducing a new universal constant ( C 0 ) and a model parameter (κ 11 ). The proposed model is then compared with experimental data for polymer/solvent systems and polymer1/polymer2 systems, which exhibit lower critical solution temperature (LCST) behaviors. Theoretical predictions and experimental results are in good agreement. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 1143–1150, 1998