Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic pvdf copolymer

Dong Kyu Roh, Sung Hoon Ahn, Jin Ah Seo, Yong Gun Shul, Jong Hak Kim

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfite, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt %, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt % of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80°C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Youngs modulus) and high thermal stability (up to 300°C), as determined by a universal testing machine (UTM) and TGA, respectively.

Original languageEnglish
Pages (from-to)1110-1117
Number of pages8
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume48
Issue number10
DOIs
Publication statusPublished - 2010 May 15

Fingerprint

Protons
copolymers
Copolymers
membranes
Membranes
conduction
acids
protons
Acids
synthesis
crosslinking
Crosslinking
Polymers
Proton conductivity
Atom transfer radical polymerization
Graft copolymers
Hydrophilicity
Esterification
polymers
vinylidene

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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title = "Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic pvdf copolymer",
abstract = "A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfite, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt {\%}, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt {\%} of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80°C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Youngs modulus) and high thermal stability (up to 300°C), as determined by a universal testing machine (UTM) and TGA, respectively.",
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Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic pvdf copolymer. / Roh, Dong Kyu; Ahn, Sung Hoon; Seo, Jin Ah; Shul, Yong Gun; Kim, Jong Hak.

In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 48, No. 10, 15.05.2010, p. 1110-1117.

Research output: Contribution to journalArticle

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