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Accession Number:
ADP007482
Title:
Dielectric, TSC and Electromechanical Measurements on Some Prospective NLO Polymers,
Corporate Author:
LEEDS UNIV (UNITED KINGDOM) DEPT OF PHYSICS
Report Date:
1991-02-01
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.
Supplementary Note:
This article is from 'Multifunctional Materials Held in Boston, Massachusetts on November 29-December 1 1989. Materials Research Society Symposium Proceedings. Volume 175,' AD-A253 089, p289-296.
Pages:
0008
File Size:
0.00MB
