Derivation of diffusion coefficient of N2 gas in rubber based on measurement using laser heterodyne interferometry

In this paper it is reported that the diffusion coefficient of N₂ gas in a rubber sheet is derived based on combination of measurement using U-tube and laser heterodyne interferometry and one dimension diffusion theory successfully. Experiments were carried out under different pressure and temperature conditions to investigate the dependency of diffusion of gas in rubber. A conclusion has been drawn that diffusion of N₂ gas in rubber may not be as easy to occur as N₂ in VG10 mineral oil.