Abstract
Phase equilibria for polymer systems were reviewed. The authors briefly described such methods as barometric method, gravimetric method, gas chromatographic method, and permeation method used as experimental techniques to measure the vapor-liquid equilibria of polymer systems, i.e., solubilities of gases and vapors in polymers. Furthermore, the corresponding state principle, solution models, and equation of state for prediction and correlation of vapor-liquid equilibria were described. For liquid-liquid equilibria, the experimental results obtained using the cloud point method and the correlated results obtained using a solution model for cyclopentane-polystyrene system were shown as an example of binary systems. The experimental and correlated results for the aqueous two-phase systems were shown as an example of multicomponent systems. Finally, the results of correlation for the volume-phase transition of polymeric gels were presented.
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