Gas Permeation and Diffusion in Cross-Linked Poly(ethylene glycol diacrylate)

Abstract

The permeability of cross-linked poly(ethylene glycol diacrylate) (XLPEGDA) to He, H2, O2, N2, CO2, CH4, C2H4, C2H6, C3H6, and C3H8 was determined at temperatures ranging from −20 to +45 °C and at fugacities up to approximately 15 atm for some gases. Diffusion coefficients of CO2 and hydrocarbons were calculated as a function of temperature and local penetrant concentration. The effect of temperature and fugacity on permeability and diffusivity is satisfactorily described using either an activated diffusion model or a free volume-based model.