Abstract
Sodium sulfonate-functionalized poly-(ether ether ketone)s derived from Bisphenol A with a degree of sulfonation up to 2.0 were synthesized by aromatic nucleophilic polycondensation of various amounts of 5,5′-carbonylbis(2-fluorobenzenesulfonate) (1), 4,4′-difluorobenzophenone (2) and Bisphenol A (3). Copolymers showed excellent thermal stability and good mechanical properties. The selectivity of water vapor over nitrogen of membranes prepared from copolymers 3a and 3b was determined to be 3.43×106 and 1.05×107, respectively.
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