Microstructure and Electrical Properties of Kevlar/Polypyrrole Composite Fibers,

Abstract

Electrically conducting composite polypyrrole/poly(p-phenylene-terephthalamide) (PPTA or KEVLAR) fibers have been prepared by chemical polymerization of pyrrole within the interstices of the hydrogen-bonded gel structure of never-dried PPTA fibers. The resultant fibers contain a uniform dispersion of polypyrrole, as evidenced by scanning electron microscopy. The temperature dependence of the electrical conductivity of these hybrid fibers is presented. The conductivity is well described by the fluctuation-induced charge transport model over the entire temperature range of interest. However, the low temperature electrical conductivity also exhibits a hopping-like temperature dependence, and an Arrhenius-like temperature dependence is observed in the high temperature limit. Measurements of the temperature-dependent thermopower are indicative of a p-type carrier.

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1991
Accession Number
ADP007487

Entities

People

  • D. Degroot
  • L.p. Rector
  • S.h. Carr
  • T.j. Marks

Organizations

  • Northwestern University

Tags

DTIC Thesaurus Topics

  • Composite Materials
  • Conductive Polymers
  • Conductivity
  • Electrical Conductivity
  • Electrical Properties
  • Electron Microscopy
  • High Temperature
  • Low Temperature
  • Materials
  • Microscopy
  • Microstructure
  • Polypyrroles
  • Scanning Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology
  • Reinforced Composite Materials

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene