Microstructure and charge transport in hybrid metallophthalocyanine/rigid rod polymer fibers

J. M C Redman, J. M. Giesler, W. R. Romanko, S. H. Carr, P. A. Depra, Tobin J Marks, H. O. Marcy, C. R. Kannewurf

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5 Citations (Scopus)

Abstract

Strong, environmentally stable, electrically conductive fibers can be fabricated from solutions of nickel phthalocyanine (Ni(Pc)) and the ultra-high modulus polymers poly-(p-phenyleneterephthalamide) (PPTA, Kevlar) or poly-p-phenylenebenzobisthiazole) (PBT) by dry-jet, wet-spinning techniques, followed by chemical or electrochemical doping. The fiber mechanical strength s at a particular composition is a simple linear function of the Ni(Pc) I volume fraction Φc : s ≈ sp (1-Φc), where sp is the of a pure PPTA or PBT fiber. The electrical conductivity σ for Φc>0.17 obeys the empirical relationship: 1n(σ) = Φc1n(σc) + (1 - Φc) 1n(σp) where σc represents the conductivity of polycrystalline Ni(Pc)I and σp denotes the conductivity of pure PPTA or PBT. The temperature dependence of σ is thermally-activated and can be fit to a fluctuation-induced carrier tunnelling model. In contrast, the thermoelectric power S of the fibers is p-type and metal-like (S ∼ T), strongly resembling that of Ni(Pc) I single crystals. X-ray diffraction shows microstructural evidence for phase separation and the presence of a fine (domain size

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalSynthetic Metals
Volume29
Issue number2-3
DOIs
Publication statusPublished - Mar 21 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

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    Redman, J. M. C., Giesler, J. M., Romanko, W. R., Carr, S. H., Depra, P. A., Marks, T. J., Marcy, H. O., & Kannewurf, C. R. (1989). Microstructure and charge transport in hybrid metallophthalocyanine/rigid rod polymer fibers. Synthetic Metals, 29(2-3), 25-30. https://doi.org/10.1016/0379-6779(89)90874-6