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Pure Appl. Chem., 2005, Vol. 77, No. 3, pp. 593-603

Modification of the glass transitions of polymers by high-pressure gas solubility

Séverine A. E. Boyer and J.-P. E. Grolier

Laboratoire de Thermodynamique des Solutions et des Polymères, Université Blaise Pascal, 63177 Aubière, France

Abstract: The newly developed VW-pVT technique for simultaneously measuring the solubility of a gas in a polymer and the concomitant change of volume of the polymer has been used to estimate the solubilities of N2, CO2, and two hydrofluorocarbons, HFC-134a and HFC-152a, in polystyrene (PS). In conjunction with these solubility data, Chow’s model has been used to calculate the change of the glass-transition temperature of the polymer resulting from gas sorption. The performance of this model for predicting the glass-transition temperature shift is then discussed.