Grafting polythiophene on polyethylene surfaces

N. Chanunpanich, A. Ulman, Y. M. Strzhemechny, S. A. Schwarz, J. Dormicik, A. Janke, H. G. Braun, T. Kratzmüller

Research output: Contribution to journalArticlepeer-review

Abstract

Polythiophene (PT) was grafted on PE film using three reaction steps. First, PE films were brominated in the gas phase, yielding PE-Br; second, a substitution reaction of PE-Br with 2-thiophene thiolate anion gave the thiophene-functionalized PE; finally PT was grafted on the PE surface using chemical oxidative polymerization to give PE-PT. The polymerization was carried out in a suspension solution of anhydrous FeCl3 in CHCl3, yielding a reddish PE-PT film after dedoping with ethanol. ATR-FTIR shows that the PT was grafted on PE in the 2,5-position. SEM imaging revealed islands of PT on the PE film. AFM analysis found the thickness of islands to be in the range of 120-145 nm. The conductivity of these thin films was in the range of 10-6 S cm-1, a significant increase from the value of ∼10-14 S cm-1 measured for PE film.

Original languageEnglish (US)
Pages (from-to)172-178
Number of pages7
JournalPolymer International
Volume52
Issue number1
DOIs
StatePublished - Jan 2003

Keywords

  • Bromination
  • Grafting
  • Polyethylene
  • Polythiophene
  • Surface modification

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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