Abstract
Electrical polarizations in ascast and electrically polarized 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 inferred from birefringence and x-ray diffraction experiments, but the contribution of observed persistent electrical polarization appears to be small. The major contribution is concluded as being due to trapped space charges, some part of which may be associated with residual solvent molecules. Small ordered regions within polyacrylonitrile are expected to play a role in development of each contribution to final persistent electrical polarization.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 101-115 |
| Number of pages | 15 |
| Journal | Journal of Macromolecular Science, Part B |
| Volume | 13 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 1977 |
Funding
The authors wish to thank both the Vistron Corporation for supplying us with PAN homopolymer synthesized especially for our work and the Atlas Electric Devices Company for loan of their Electret Thermal Analyzer. Fellowships were generously provided by the Walter P. Murphy fund (for R.J.C.) and the Motorola Corporation (for S.I.S.). Financial support of this research has come from the Advanced Research Projects Agency through the Northwestern Materials Research Center and from the Office of Naval Research.
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- Polymers and Plastics
- Materials Chemistry