Piezoelectricity in Polyacrylonitrile.

Abstract

The piezoelectricity and related properties in ion-doped (NH4NO3, NaNO3) and undoped films of polyacrylonitrile have been measured as a function of temperature. The piezoelectric constants of both ion-doped and undoped films show a maximum around 80 C and thereafter decrease markedly with temperature. A maximum of thermally stimulated discharge current (TSDC) around 90 C is observed in both ion-doped and undoped films. An abrupt decrease of piezoelectric constant around 90 C and TSDC maximum around 90 C are ascribed to randomization of nitrile dipoles in ordered regions. The piezoelectric constant of stretched films has a tendency to increase with stretching. The piezoelectric constant, d sub 31, changes from positive to negative when temperature rises above 110 C. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 04, 1980
Accession Number
ADA081250

Entities

People

  • H. Ueda
  • S. H. Carr

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Compounds
  • Chemical Engineering
  • Chemistry
  • Composite Materials
  • Conductivity
  • Depolarization
  • Dipole Moments
  • Engineered Materials
  • Engineering
  • Films
  • Materials
  • Materials Laboratories
  • Materials Science
  • Military Research
  • Physics
  • Physics Laboratories
  • Standards

Fields of Study

  • Materials science

Readers

  • Instructional Design and Training Evaluation.
  • Materials Science and Engineering.
  • Mathematics or Statistics