Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (05): 1100.doi: 10.3969/j.issn.0251-0790.2012.05.043

• Polymer Chemistry • Previous Articles     Next Articles

Synthesis and Properties of Poly(aryl ether sulfones) Functionalized with Pendant Perfluoroalkyl Sulfonic Acid for Proton Exchange Membrane

WANG Yong-Peng, YUE Xi-Gui, PANG Jin-Hui, LI Xue-Feng, LI Na, ZHANG Hai-Bo, JIANG Zhen-Hua   

  1. Alan G. MacDarmid Institute, Jilin University, Changchun 130012, China
  • Received:2011-07-24 Online:2012-05-10 Published:2012-05-10

Abstract: A novel poly(arylene ether sulfone) with a perfluoroalkyl sulfonic acid pendant(PES-PSA) was synthesized by Ullman coupling of poly{oxy-4,4'-oxy-4,4'-diphenylsulfone}(PES-Br) and potassium 1,1,2,2-tetrafluoro-2-(1,1,2,2-tetrafluoro-2-iodo-ethoxy)ethanesulfonate(PSA-K). The introduction of the perfluoroalkyl sulfonic acids was successfully carried out with high conversion(c.a. 50%) to yield the desired polymer. Even with a low ion exchange capacity(IEC) of 0.907 meq./g, PES-PSA exhibited a high proton conductivity of 0.039 S/cm at 80 ℃ under 100% relative humidity. The low IEC makes the membrane own good dimensional stability and thermal stability. Other membrane properties, such as thermal properties and water uptake were also investigated in detail.

Key words: Perfluoroalkyl sulfonic acid, Poly(aryl ether sulfones), Proton exchange membrane

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