Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5150485 | Solid State Ionics | 2017 | 8 Pages |
Abstract
Novel sulfonated poly(arylene ether sulfone) polymers with 3,4-difluoro-phenyl group (2F-SPAES-xx) were successfully synthesized via the direct copolymerization of 3,3â²-disulfonate-4,4â²-dichlorodiphenylsulfone, 4,4-dichlorodiphenylsulfone and 3,4-difluoro-phenyl hydroquinone. The polymers with different sulfonation degree were prepared by changing the mole ratio (20%-40%) of sulfonated monomer in the polymerization reaction. The proton conductivity, thermal and oxidative stability, mechanical properties, water uptake, swelling ratio, phase-separated morphology of the membranes were explored. The 2F-SPAES-40 membrane showed higher proton conductivity and better phase separation, oxidative stability than that of sulfonated poly(arylene ether sulfone) membrane (SPAES-6FPA-40). The proton conductivity of 2F-SPAES-40 membrane was up to 0.142 Scmâ 1 at 80 °C in wet. These results indicated that incorporation of hydrophobic 3,4-difluoro-phenyl side group enhanced the oxidative stability and improved the proton conductivity by promoting the phase separation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
RiMing Chen, Guang Li, ShengLin Yang, MengYun Xiong, JunHong Jin,