Polyaniline: Inter-Relationship between Ultra-Structure and Properties

Abstract

The conductivity (doped form), degree of crystallinity, tensile strength, solubility and swellability (as a gel) of polyaniline (emeraldine oxidation state) is found to be greatly dependent on the past chemical and/or mechanical history of the polymer which significantly affects the ultrastructure of the material. The conductivity and tensile strength of polyaniline films and fibers can be greatly enhanced by stretch orientation which is also accompanied by a monotonic increase in crystallinity. The solubility of the emeraldine base in NMP is greatly decreased as the degree of crystallinity is increased. The conductivity shows relatively little dependency on molecular weight as compared to crystallinity; it first rises monotonically with increase in molecular weight and then remains essentially independent of molecular weight. Gels of oriented emeraldine base exhibit a remarkable anisotropic swelling in NMP and in mixtures of NMP/CH3OH.

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Document Details

Document Type
Technical Report
Publication Date
Jun 10, 1991
Accession Number
ADA236993

Entities

People

  • Alan G. Macdiarmid
  • E. M. Scherr
  • M. A. Druy
  • S. K. Manohar
  • Xuming Tang

Organizations

  • University of Pennsylvania

Tags

DTIC Thesaurus Topics

  • Chemistry
  • Conductivity
  • Films
  • Governments
  • Materials
  • Mechanical Properties
  • Molecular Weight
  • Oxidation
  • Pennsylvania
  • Polyanilines
  • Polymers
  • Security
  • Semi-Flexible Rod Polymers
  • Solubility
  • Tensile Strength
  • United States
  • Universities

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Nanoscale Plasmonic Nanotechnology
  • Reinforced Composite Materials