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Advanced Ferroelectricity$
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Robert Blinc

Print publication date: 2011

Print ISBN-13: 9780199570942

Published to Oxford Scholarship Online: January 2012

DOI: 10.1093/acprof:oso/9780199570942.001.0001

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Ferroelectric polymers

Ferroelectric polymers

Chapter:
(p.187) 7 Ferroelectric polymers
Source:
Advanced Ferroelectricity
Author(s):

Robert Blinc

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199570942.003.0007

The physical properties of ferroelectric polymers, like polyvinylidene fluoride and its copolymers are briefly discussed. It is shown that polar nanoclusters are induced either by compositional disorder, as in the case of the terpolymer P(VDF‐TrFE‐CFE) or by electron irradiation as in P(VDF‐TrFE) giving rise to relaxor behaviour. A spherical random‐field–random‐bond model of relaxor polymers is presented and the electrostrictive coefficients are calculated as well as the linear and non‐linear dielectric properties. It is shown that the main difference between inorganic and polymeric relaxors is the physical character of polar nanoregions, the nature of the interaction between them and the origin of the random fields.

Keywords:   structure of electroactive polymers, properties of electroactive polymers, hysteresis loops, 2D ferroelectricity, spherical random‐field–random‐bond model

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