Synthesis and characterization of poly(vinylidene fluoride)-g-sulfonated polystyrene graft copolymers for proton exchange membrane

Zhicheng Zhang, Elena Chalkova, Mark Valentinovich Fedkin, Chunmei Wang, Serguei Lvov, Sridhar Komarneni, Tze-chiang Chung

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A series of poly(vinylidene fluoride)-g-sulfonated polystyrene (PVDF-g-SPS) graft copolymers were synthesized and examined with the focus of understanding how the polymer microstructure (backbone molecular weight, graft density, graft length, sulfonic acid concentration, ion exchange capacity, etc.) affects their morphology, water uptake and proton conductivity under various environmental conditions. The PVDF-g-SPS graft copolymer with a combination of a high PVDF backbone, low SPS graft density, and high graft length self-assembles into a microphase-separated morphology with randomly oriented ionic channels imbedded in the hydrophobic PVDF matrix, offers a high ion exchange capacity (IEC=2.75 mmol/g) and resistance to excessive water swelling, which yields notable higher proton conductivity than Nafion under 30-120°C and high humidity conditions.

Original languageEnglish (US)
Pages (from-to)31-48
Number of pages18
JournalACS Symposium Series
Volume1040
DOIs
StatePublished - Apr 30 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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