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

Yaojian Zhang, Je Deok Kim, Kenji Miyatake

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number44218
JournalJournal of Applied Polymer Science
Volume133
Issue number46
DOIs
Publication statusPublished - 2016 Dec 10
Externally publishedYes

Keywords

  • batteries and fuel cells
  • conducting polymers
  • crosslinking
  • membranes
  • polyelectrolytes

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes'. Together they form a unique fingerprint.

Cite this