Dielectric Properties of Piezoelectric Polyimides

Autor:	Tomasz Breczewski, B. Gonzalo, Luis Manuel León, M. A. Perez-Jubindo, M. R. de la Fuente, José Luis Vilas, J. R. Dios
Rok vydání:	2008
Předmět:	Materials science Nitrile Poling Dielectric Condensed Matter Physics Piezoelectricity Electronic Optical and Magnetic Materials Amorphous solid chemistry.chemical_compound Dipole chemistry Thermal Composite material Glass transition
Zdroj:	Ferroelectrics. 370:3-10
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190802380227
Popis:	Polyimides are the most promising amorphous piezoelectric polymers not only because of their excellent thermal, mechanical and dielectric properties, but also and, mainly due to their high glass transition temperatures. Here we report on the synthesis of polyimides with one CN (poly2-6) and two CN groups (poly2CN) in the repetition unit, the latter being synthesised for the first time. The dielectric measurements show that remnant polarisation and piezoelectric coefficients values depend strongly on the number of pendant nitrile dipoles in the repetition unit, on the orientation of the backbone anhydride dipole as well as on the imidisation and the poling processes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3f300d4419808001cba9ad8da8a427ff https://doi.org/10.1080/00150190802380227 Zobrazit plný text záznamu