SORPTION AND PARTIAL MOLAR VOLUME OF GASES IN POLYBUTADIENE

Sorption of He, H2, N2, O2 Ar, CH4, C2H6 in polybutadiene and the dilation of the polymer due to sorption of the gases are investigated over the pressure range 0-50 atm at 25°C. For CO2 the measurements are made at temperatures ranging from 15 to 80°C. Partial molar volumes of the gases in the polymer are determined. The temperature dependence of partial molar volume is discussed on the basis of the data for CO2. The Flory-Huggins interaction parameters of CO2, C2H4, and C2H6 are also estimated.