Gas Permeation through Glassy Polymer Membranes with High Glass Transition Temperature

摘要

The sorption equilibria and permeation rates for carbon dioxide in such glassy polymer memrbanes with high glass-transition temperature as polyimide, polyetherimide, polysulfone and polyethersulfone membranes, were measured. The sorption isotherms for these systems can be described well in terms of the dual-mode sorption model, whereas the pressure dependences of the mean permeability coefficients are simulated better by a modified dual-mode mobility model than the conventional dual-mode mobility model in which the Henryu27s law and Langmuir populations execute four kinds of diffusive movements.