Thermally Stimulated Discharge Currents from Polyacrylonitrile.

Abstract

Electrical polarization in as-cast and poled films of stretched and unstretched polyacrylonitrile have been measured with the thermally stimulated discharge technique. Preferential orientation of nitrile side-groups in polarized specimens is observed with birefringence and inferred from x-ray diffraction experiments, but the contribution of total electrical polarization appears to be small. The major contribution is concluded as being due to trapped space charges, some part of which is probably associated with residual solvent molecules. Because this space charge is probably comprised of unequal quantities of positively and negatively charged species, polarized polyacrylonitrile is predicted to behave as a monopole electret. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 08, 1975
Accession Number
ADA019203

Entities

People

  • R. J. Comstock
  • S. H. Carr
  • Samuel I. Stupp

Organizations

  • Northwestern University

Tags

DTIC Thesaurus Topics

  • Acrylonitrile Polymers
  • Birefringence
  • Diffraction
  • Electrets
  • Molecules
  • Orientation (Direction)
  • Polarization
  • Residuals
  • Space Charge
  • X Rays
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology
  • Theoretical Analysis.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • Space
  • Space - Hall-Effect Thruster