Effect of crystallinity on gas permeation in miscible polycarbonate–copolyester blends

摘要: Permeation rates of helium, methane, and carbon dioxide in miscible blends polycarbonate a copolyester were measured at 35°C. The permeabilities for semicrystalline having cyrstallinity induced by annealing compared to fully amorphous blends. Crystallinity caused slightly greater impedance transport than it did helium or methane. relative permeation one gas another, an issue important membrane separations, varied greatly with blend composition; however, the effect crystallinity was not large.