A Gel-Permeation Chromatography Study Of Electrochemically Synthesized Poly(3-Alkylthiophenes)

Abstract

Poly(3-n-pentylthiophene) and poly(3-n-hexylthiophene) were prepared using potentiostatic method and were characterized by gel-permeation chromatography (g.p.c.) in THF. In general, the molecular weight of the polymers increased as the applied potential was increased in the range of 1.3 to 1.7 V vs. SCE. The presence of 2,2'-bithiophene in the polymerization system resulted in a slight decrease in molecular weight but the polymer chains having higher regularity as evidenced by longer pi-conjugation length. At the potentials greater than 1.9 V, the molecular weight decreased because of polymer degradation. The results strongly support the electrophilic aromatic substitution mechanism for electrochemical polymerization of thiophene monomers.

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Document Details

Document Type
Technical Report
Publication Date
Jun 26, 1992
Accession Number
ADA259864

Entities

People

  • J. Tian
  • Yuting Wei

Organizations

  • University of Pennsylvania

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Acetonitrile
  • Chemistry
  • Chromatography
  • Conductive Polymers
  • Conjugated Polymers
  • Degradation
  • Gel Permeation Chromatography
  • Macromolecules
  • Molecular Weight
  • Molecules
  • Polymer Degradation
  • Polymeric Films
  • Polymerization
  • Polymers
  • United States

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology