Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes

Yaojian Zhang, Je Deok Kim*, Kenji Miyatake

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

The synthesis and characterization of crosslinked aromatic polymer membranes with high ion exchange capacity (IEC) values are reported. Through aromatic nucleophilic substitution polycondensation and the subsequent sulfonation reaction, the highly sulfonated polymers SPPSU-2S and SPPSU-4S with high molecular weight (Mn = 138–145 kDa, Mw = 200–279 kDa) and well-defined structures were synthesized. By solution casting and thermal annealing treatment, flexible crosslinked membranes with high solvent insolubility were obtained. The membranes exhibited mechanical and chemical stability as confirmed by dynamic mechanical analysis (DMA) and conductivity measurement. The crosslinked SPPSU-4S membrane with IEC = 3.20 meq/g showed the highest proton conductivity of 0.163 S/cm at 120 °C, 90% RH, and improved thermal stability compared with its precursor (uncrosslinked) membrane. The results show that simple annealing method could improve significantly membranes properties of highly sulfonated aromatic polymers.

本文言語English
論文番号44218
ジャーナルJournal of Applied Polymer Science
133
46
DOI
出版ステータスPublished - 2016 12 10
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 表面、皮膜および薄膜
  • ポリマーおよびプラスチック
  • 材料化学

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