Korean Journal of Chemical Engineering, Vol.10, No.1, 44-48, January, 1993
GAS PERMEATION THROUGH GLASSY POLYMER MEMBRANES WITH RELATIVELY LOW GLASS-TRANSITION TEMPERATURE
When the glass-transition temperature of the polymer is not so much higher than the experimental temperature, the pressure dependence of the mean permeability coefficient of the polymer membrane to a gas is apt to deviate from the prediction by the conventional dual-mode mobility model, and to obey a similar model with concentration-dependent diffusivities because of the plasticization action of sorbed gas in the polymer membrane. In this work, sorption and permeation for oxygen and carbon dioxide in a membrane of polystyrene whose glass-transition temperatures is 95℃, were measured to discuss the mechanism of gas diffusion in glassy polymer membranes with relatively low glass-transition temperature at 30,40 and 50 ℃ respectively.
- Sada E, Kumazawa H, Xu P, J. Appl. Polym. Sci., 35, 1497 (1988)
- Sada E, Kumazawa H, Xu P, Nishigaki M, J. Membr. Sci., 37, 165 (1988)
- Kumazawa H, Wang JS, Fukuda T, Sada E, J. Membr. Sci., in press
- Zhou S, Stern SA, J. Polym. Sci. B: Polym. Phys., 27, 205 (1989)
- Sada E, Kumazawa H, Wang JS, J. Polym. Sci. B: Polym. Phys., 30, 105 (1992)
- Marquardt DW, J. Soc. Industr. Math., 11, 2 (1963)
- Paul DR, Koros WJ, J. Polym. Sci. B: Polym. Phys., 14, 675 (1976)