Microstructure and protonic conductivity of H3PO 4-doped polyethylenimine-siloxane chemically covalently organic-inorganic hybrids

Wuu Jyh Liang, Shang Ju Hsieh, Chang Yu Hsu, Wei Fu Chen, Ping Lin Kuo

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14 Citations (Scopus)


The chemically covalent polyethylenimine-siloxane hybrids doped with various amounts of ortho-phosphoric acid (H3PO4) were prepared and characterized by FTIR, DSC, TGA, and solid-state NMR spectra. The protonic conduction behavior of these materials was also investigated by means of impedance measurements. These observations indicate that the hydrogen bonding and protonic interactions exist between the dopant H3PO4 and the hybrid host, resulting in an increase in Tg of polyethylenimine segments. These hybrids are thermally stable up to 200°C from TGA analysis. Conductivity studies show an Arrhenius behavior characteristic and the Grotthus-like proton conduction, and a high conductivity of 10-2-10-3 S cm-1 at 110°C in dry atmosphere for the hybrid membrane with H3PO4/EI of 0.5.

Original languageEnglish
Pages (from-to)2135-2144
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number15
Publication statusPublished - 2006 Aug 1

All Science Journal Classification (ASJC) codes

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


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