The effects of CO2 exposure on pure and mixed gas permeation behavior: comparison of glassy polycarbonate and silicone rubber

Physical aging in carbon molecular sieve membranes

“…This topic has also been explored for glassy polymers exposed to a perturbing effect [65]. Most lab-scale characterization studies are performed with downstream vacuum permeation conditions, which are efficient for materials characterization but not practical for most industrial applications.…”

Crosslinkable mixed matrix membranes with surface modified molecular sieves for natural gas purification: I. Preparation and experimental results

“…They also showed that this hindered chain mobility can extend over 100 nm from a surface [33]. It is known that physical aging in polymer membranes leads to more consolidated chain packing, which results in lower permeability and greater selectivity [34][35][36][37][38][39][40]. If PDMC and SSZ-13 truly interact favorably, as suggested by Fig.…”

Effect of relative humidity and temperature on the gas transport properties of 6FDA–6FpDA polyimide: Experimental study and modelling

“…E P,i calculated from Eq. (11) therefore provides a reliable estimate of the actual activation energy for permeation in 6FDA-6FpDA at different water activity values.…”

“…the protocol used for preparation [6], the exposition to swelling agents [11], [12] or thermal treatments [13]- [15].…”