Macromolecular Research

, Volume 18, Issue 10, pp 992–1000 | Cite as

Terminally-crosslinked sulfonated poly(fluorenyl ether sulfone) as a highly conductive and stable proton exchange membrane

  • Roshni Lilly Thankamony
  • Myung-Gun Lee
  • Kyuwon Kim
  • Jong-Dal Hong
  • Tae-Hyun Kim
  • Hye-Jin Lee
  • Hyoung-Juhn Kim
  • SukWoo Nam
  • Yong-beom Lim
Articles
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Abstract

Sulfonated poly(fluorenyl ether sulfone) (PFES) with a terminally-crosslinked network structure was prepared by heat-induced crosslinking of the allyl-terminated telechelic sulfone polymers using a bisazide. The crosslinked polymer membrane with a sulfofluorenyl moiety of 70% (PFES-70) showed excellent hydrolytic, dimensional, and mechanical stability. The crosslinked PFES-70 membrane revealed a proton conductivity of 0.04 S/cm at 20 °C, which increased significantly with increasing temperature. The conductivity of 0.38 S/cm at 100 °C for PFES-70 was higher than that of both non-crosslinked (0.33 S/cm) and Nafion® (0.17 S/cm). In addition, the crosslinked PFES-70 showed a methanol permeability of only 1.4% (3.9×10−8 cm2/s) compared to Nafion®.

Keywords

polymer electrolyte membrane sulfonated poly(fluorenyl ether sulfone) terminal crosslinking proton conductivity dimensional stability 
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Copyright information

© The Polymer Society of Korea and Springer Netherlands 2010

Authors and Affiliations

  • Roshni Lilly Thankamony
    • 1
  • Myung-Gun Lee
    • 1
  • Kyuwon Kim
    • 1
  • Jong-Dal Hong
    • 1
  • Tae-Hyun Kim
    • 1
  • Hye-Jin Lee
    • 2
  • Hyoung-Juhn Kim
    • 2
  • SukWoo Nam
    • 2
  • Yong-beom Lim
    • 3
  1. 1.Department of ChemistryUniversity of IncheonIncheonKorea
  2. 2.Fuel Cell Research CenterKorea Institute of Science and TechnologySeoulKorea
  3. 3.Department of Materials Science and EngineeringYonsei UniversitySeoulKorea

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