Dielectric, TSC and Electromechanical Measurements on Some Prospective NLO Polymers,
Abstract
The pyroelectric coefficients of a range of polymers with a methacrylate backbone and nitrostilbene or nitrobipheny mesogens attached by a 3 or 6 carbon spacer have been measured in order to assess the efficiency of the poling process. It is found that the response is much lower than the guest-host system MNA in PMMA, suggesting that the polar mesogens pack anti-parallel and that this alignment is not broken by the applied field. These strong interactions also provide an explanation for the absence of the B relaxation process in the experimental polymers and therefore the brittle nature of the films. They may also explain the stability of the polarisation achieved.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1991
- Accession Number
- ADP007482
Entities
People
- Geoff R. Daviess
- Ian M. Ward
- Paul L. Carr
Organizations
- University of Leeds