| 摘要 |
Novel fluorinated aromatic polyimide, polyamide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides, polyamides and polyamide-imides are formed from diamines of the formula <IMAGE> where Ar' is any aromatic diol moiety and X is independently fluorinated alkyl groups having 1 to 6 carbon atoms, most preferably a trifluoromethyl group, m is an integer from 1 to 4, preferably 1.
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