| Abstract: | Sorption and transport studies of several industrial solvents have been investigated through a Uralite 3142 polyurethane. Diffusion coefficients have been measured for the preswollen and fully swollen polyurethanes. For majority of solvents, non-Fickian transport mode was observed and these results have been interpreted in terms of polymer-penetrant interactions. Temperature-dependent diffusion parameters followed the Arrhenius relation from which energy of activation have been obtained. The Flory–Rehner equation, in spite of its limitations, has been found to be useful to estimate the molar mass between crosslinks of the network polyurethane. |
