Preparation of 4(5)-vinylimidazole-co-acrylic acid copolymer and thermal performances related to applicability as PEM fuel cells

Manita Jithunsa, Kohji Tashiro, Suzana Nunes, Suwabun Chirachanchai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A series of acrylic acid and 4(5)-vinylimidazole copolymers for a non-hydrous proton transferring membrane used in polymer electrolyte membrane for fuel cell (PEMFC) are reported. The feed ratio of each monomer results in the variation of copolymer as evaluated by Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy (1H-NMR). Differential scanning calorimeter and thermal gravimetric analyzer confirm the thermal properties of copolymer films with Tg at 105-177 °C and Td above 230 °C. The simultaneous analysis of wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) suggests the thermal performance about the decrease in domain size as a consequence of the loss of moisture content in the membrane and the increase in domain size as a consequence of chain mobility after Tg. The proton conductivities under anhydrous condition of the copolymer membranes are in the range of 10-2 S/cm even up to 120 °C.

Original languageEnglish (US)
Pages (from-to)1389-1395
Number of pages7
JournalPolymer Degradation and Stability
Volume93
Issue number7
DOIs
StatePublished - Jul 1 2008

Keywords

  • 4(5)-Vinylimidazole
  • Acrylic acid
  • Anhydrous membrane system
  • Polymer electrolyte membrane fuel cell

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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