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Effect of UV crosslinking and physical aging on the gas permeability of thin glassy polyarylate films |
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| Authors: | M S McCaig D R Paul |
| Affiliation: | Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA |
| Abstract: | The effect of crosslinking by UV irradiation on the gas permeation properties of thin films (thickness ≤1 μm) made from two benzophenone-based polyarylates were examined. In addition to the permeation response to UV crosslinking in these two polymers, the effects of crosslinking on the rate of physical aging was also explored. The sequence of physical aging and crosslinking, as well as reversal of the aging process was studied in order to separate the similar effects of aging and crosslinking. The results show that crosslinking very thin films can greatly improve the long-term performance of membranes when compared to noncrosslinked films of similar thickness. |
| Keywords: | Benzophenone-based polyacrylates UV cross-linking Physical aging |
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