Karunaweera, ChamaalMusselman, Inga H.Balkus, Kenneth J.Ferraris, John P.2019-11-082019-11-082019-03-280376-7388https://hdl.handle.net/10735.1/7098Due to copyright restrictions full text access from Treasures at UT Dallas is restricted to current UTD affiliates (use the provided Link to Article).Although propylene/propane separation remains a challenge for industrial processes, carbon molecular sieve membranes (CMSMs) have the potential to replace traditional separation methods. A high molecular weight crosslinkable polyimide was utilized to fabricate CMSMs, which showed pure gas permeabilities in excess of 400 barrers with propylene/propane selectivities as high as 25. Mixed gas (C₃H₈:C₃H₆ 50:50) measurements yielded a propylene permeability of 257 barrers and a selectivity of 20. CMSMs from thermally precrosslinked polymer precursors demonstrated a 98% propylene permeability retention after aging for 20 days under vacuum. Active gas flow conditions resulted in slightly lower permeability retention (92.5%) after 15 days of testing. ©2019 Elsevier B.V.©2019 Elsevier B.V. All Rights Reserved.6FDA-DABAAgingCarbon molecular sieve membranesPropylene/propane separationThermal crosslinkingHexafluoroisopropylidene diphthalic anhydrideDiaminobenzoic acidPyromellitic dianhydrideBiphenyltetracarboxylic dianhydrideDimethylacetamideMethyl-2-pyrrolidoneGel permeation chromatographyTetrahydrofuranThermogravimetryScanning electron microscopyKarunaweera, C., I. H. Musselman, K. J., Jr. Balkus, and J. P. Ferraris. 2019. "Fabrication and characterization of aging resistant carbon molecular sieve membranes for C 3 separation using high molecular weight crosslinkable polyimide, 6FDA-DABA." Journal of Membrane Science 581: 430-438, doi: 10.1016/j.memsci.2019.03.065581