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

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10 Citations (Scopus)


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 cm 2/s) compared to Nafion®. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)992-1000
Number of pages9
JournalMacromolecular Research
Issue number10
Publication statusPublished - 2010 Oct 1
Externally publishedYes



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

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

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