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 |
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論文番号 | 44218 |
ジャーナル | Journal of Applied Polymer Science |
巻 | 133 |
号 | 46 |
DOI | |
出版ステータス | Published - 2016 12月 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