Pyroelectricity in Poled Thin Films of Aromatic Polyurea Prepared by Vapor Deposition Polymerization
- 1 December 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (12A) , L2245
- https://doi.org/10.1143/jjap.28.l2245
Abstract
Aromatic polyurea films with a thickness of less than 1 µm were prepared by vapor deposition polymerization using different kinds of aromatic diamine and diisocyanate monomers. After poling above the glass transition temperature, the films acquired a pyroelectric activity of (1.0–2.5)×10-5 C/m2K, which is comparable to that of polyvinylidene fluoride. The temperature limit for the activity was 150 to 200°C, depending on the kind of monomer. The multilayer films consisting of aromatic polyurea and aluminum electrodes showed a high sensitivity proportional to the number of layers.Keywords
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