Synthesis and Electrical Properties of Polyacetylene Copolymers from Poly(phenyl vinyl sulfoxide) and Its Oxidized Products

Louis M L LEUNG*, Kam Ho Tan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Poly(phenyl vinyl sulfoxide), a soluble precursor to polyacetylene, was synthesized by anionic polymerization. Different fractions of the thermally labile phenyl vinyl sulfoxide pendant groups were oxidized to thermally stable phenyl vinyl sulfones in order to control the degree of conjugation in the polymer main chain after elimination. The mean conjugation length (MCL), the total number percentage of nonconjugated structures or nonconductive defects, and the weight and volume fractions of acetylene units in the eliminated copolymers were calculated and correlated with their bulk conductivities after doping with iodine. A sigmoidal dependence on conductivity and a maximum in the dissipation factor measurement were observed for the four calculated variables over the full composition range. Compared to the effective-medium theory for a conducting composite, the transition range is rather broad and the “percolation” threshold at about 35–38% by volume of acetylene is equivalent to a MCL of 3 and 25% defects.

Original languageEnglish
Pages (from-to)4426-4436
Number of pages11
JournalMacromolecules
Volume26
Issue number17
DOIs
Publication statusPublished - 1993

Scopus Subject Areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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