Pure Appl. Chem., 2005, Vol. 77, No. 3, pp. 593-603
http://dx.doi.org/10.1351/pac200577030593
Modification of the glass transitions of polymers by high-pressure gas solubility
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.
Keywords
carbon dioxide; gas solubility; glass transition; HFC-134a; HFC-152a; nitrogen; polystyrene.