Conductivity and microwave dielectric response of polyaniline and poly(o-toluidine) fibers

Y. Z. Wang, Jinsoo Joo, C. H. Hsu, A. J. Epstein

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Abstract

We compare the results of temperature-dependent de conductivity σdc(T) and microwave dielectric constant ε{lunate}mw(T) for CSA doped polyaniline (PAN-CSA) and poly(o-toluidine) (POT-CSA) fibers prepared in m-cresol, HCl doped 4-fold stretched polyaniline EB fiber (PAN-HCl(4X)), and HCl doped poly(o-toluidine) (POT-HCl) fibers (unstretched and 3-fold stretched). Although POT-HCl fibers show similar σdc(T) as earlier studied POT-HCl powder, POT-CSA fiber shows significantly higher σdc(T) with much weaker temperature dependence and much larger ε{lunate}mw(T), indicating that it is much closer to the localization-delocalization boundary. PAN-HCl(4X) fiber and PAN-CSA fiber have almost identical dc conductivity at room temperature, however PAN-HCl(4X) fiber shows stronger temperature of σdc and a very large positive ε{lunate}mw, as opposed to have huge negative ε{lunate}mw observed in the PAN-CSA fiber.

Original languageEnglish
Pages (from-to)267-268
Number of pages2
JournalSynthetic Metals
Volume69
Issue number1-3
Publication statusPublished - 1995 Mar 1
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics

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