Polymerization of pyrrole and processing of the resulting polypyrrole as blends with plasticised PVC

Daniel Abraham, T. S. Jyotsna, S. V. Subramanyam

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Polypyrrole was synthesized by chemical oxidation of pyrrole in water containing various sulphonic acids like toluene sulphonic acid (TSA), sulphosalicylic acid (SSA), and camphor sulphonic acid (CSA), as well as a combination of each sulphonic acid with sodium dodecyl benzene sulphonate (NaDBS) to investigate the effect of doping on conductivity, yield, and processability of the conducting polymer. Free-standing blend films of polypyrrole and plasticized polyvinyl chloride (PVC) were obtained by casting an homogeneous suspension of the two polymers in tetrahydrofuran. The maximum conductivity of the blend film is ~ 0.3 S/cm, corresponding to a weight fraction of 0.16 w/w polypyrrole. The blend film is semiconducting in the range 300-10 K. A TG-DTA scan indicates the blend film to be amorphous with a stepwise decomposition process similar to pristine PVC. The choice of a dual dopant system during synthesis and the plasticised polymer during subsequent processing were keys to obtaining homogeneous high-quality films.

Original languageEnglish
Pages (from-to)1544-1548
Number of pages5
JournalJournal of Applied Polymer Science
Volume81
Issue number6
DOIs
Publication statusPublished - 8 Aug 2001

Keywords

  • Polymerization
  • Polypyrrole
  • Processing

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