A new homopolymer, 6FDA-CARDO(t-Bu), was prepared from 6FDA-CARDO through one-step chemical modification by adding bulky tert-butyl groups, using Friedel-Crafts alkylation. The incorporation of the bulky groups led to a significant...
A polyoxadiazole polymer POz-CF 3 was prepared, and complete gas permeation properties were investigated on its corresponding membrane using pure-, and multicomponent mixed-gas feeds. The POz-CF 3 membrane demonstrated attractive pureand sweet mixed-gas permeation properties; however, the performance of its membrane declined dramatically during sour mixed-gas testing. The modification of POz-CF 3 into its corresponding polytriazole polymers led to changes in their membranes' mechanical, thermal, processability, and gas permeation properties. For example, the membrane formation of FPT-Ph(NMe 2 ) polytriazole could not be possible due to the polymer low solubility in most solvents. In contrast, the polytriazole FPT-Ph(OH) afforded membranes with improved mechanical properties and enhanced pure-and mixed-gas permeation properties compared to POz-CF 3 membrane. The sour mixed-gas results, in particular, are very attractive and superior to most of the aromatic polymeric membranes tested with similar conditions of gas feed (20 vol % H 2 S) and operational pressure and temperature.
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