The effect of temperature and humidity on the oxygen sorption in Diels-Alder polyphenylenes

Charles W. James, Chris Cornelius, Eva Marand

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The gas transport properties of post-sulfonated Diels-Alder polyphenylene (SDAPP) membranes were measured and compared to poly(perfluoro sulfonic acid) (Nafion 112). The SDAPP materials had ion exchange capacities of 1.6 and 2.2 mequiv/g. The O2 gas permeability in the SDAPP 2.2 was about half that observed in Nafion@ 112. The O2 sorption in each membrane was measured in both the non-humidified and humidified state. In the non-humidified state, the O2 sorption followed Henry's Law behavior. The enthalpy of sorption for the SDAPP materials in the dry state was about double that measured for Nafion@ 112. In the presence of moisture, the O2 sorption followed Type IV behavior typically exhibited by hydrophilic polymers. The SDAPP samples had a higher percent wet-O2 mass uptake compared to Nafion@ 112, because of a higher ion exchange capacity.

Original languageEnglish (US)
Pages (from-to)3220-3224
Number of pages5
JournalPolymer
Volume50
Issue number14
DOIs
StatePublished - Jul 3 2009

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Keywords

  • Oxygen sorption
  • Polyphenylenes
  • Proton exchange membranes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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