Phase equilibria for polymer systems

Y. Iwai, T. Furuya, T. Ishidao, Y. Arai

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1 Citation (Scopus)


Phase equilibria for polymer systems such as (1) vapor-liquid equilibria, (2) liquid-liquid equilibria, (3) aqueous two-phase system, and (4) volume-phase transition of polymeric gel were reviewed. The authors first described solubilities of gases and vapors in molten polymers and showed that the UNIFAC-FV model is successful to predict the vapor-liquid equilibria. Furthermore, liquid-liquid equilibria of polymer-hydrocarbon solutions were discussed and it was shown that the UNIFAC-FV model with a modification is also useful to correlate the liquid-liquid equilibria. And the liquid-liquid equilibria of aqueous two-phase system and the partition of biomolecules were presented and the Flory-Huggins equation with a modification is found to be successful to correlate these phase equilibria. Finally, the volume-phase transition of polymeric gel and the concentrations between inside and outside the gels were described. The Flory-Huggins equation coupled with the rubber elasticity equation was found to be helpful to correlate these phase equilibria.

Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalInternational Journal of the Society of Material Engineering for Resources
Issue number1
Publication statusPublished - 1995

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • General Materials Science
  • Mechanical Engineering


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