Sz. Liu et al., Synthesis of poly(ether ether ketone)s with high content of sodium sulfonate groups as gas dehumidification membrane materials, MACRO RAPID, 22(8), 2001, pp. 579-582
Sodium sulfonate-functionalized polyether ether ketone)s derived from Bisph
enol A with a degree of sulfonation up to 2.0 were synthesized by aromatic
nucleophilic polycondensation of various amounts of 5,5-carbonylbis(2-fluor
obenzenesulfonate) (1), 4,4'-diflurobenzophenone (2) and Bisphenol A (2). C
opolymers showed excellent thermal stability and good mechanical properties
. The selectivity of water vapor over nitrogen of membranes prepared from c
opolymers 3a and 3h was determined to be 3.43 x 10(6) and 1.05 x 10(7), res
pectively.