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- W2007730977 abstract "We have observed time-dependent drifts in permeability and selectivity for two types of composite hollow fibers used for air separation. One was PVP [poly(4-vinyl pyridine)]/6FDA-durene/polyacrylonitrile (PAN) composite hollow fiber, and the other was 6FDA-3,5-diaminobenzonitrile/6FDA-durene/PAN composite hollow fiber. Their permeabilities dropped 50 to 70% after 3 to 5 months, while selectivities for O2N2 deteriorated slightly with time. A systematic study was carried out to investigate the causes of this creep behavior. Various composite fibers, such as polyimide/Celgard and polyimide siloxane/PAN, were fabricated to simulate the aging process. We conclude that the aging phenomenon observed for these two 6FDA-durene/PAN composite fibers was not due to the structure change of the PAN substrate, but mainly to the densification effect of the 6FDA-durene gutter layer on composite fibers. © 1996 John Wiley & Sons, Inc." @default.
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- W2007730977 date "1996-01-03" @default.
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- W2007730977 title "Aging phenomenon of 6FDA-polyimide/polyacrylonitrile composite hollow fibers" @default.
- W2007730977 doi "https://doi.org/10.1002/(sici)1097-4628(19960103)59:1<77::aid-app12>3.0.co;2-5" @default.
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