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Electric field‐induced piezoelectricity in polymer film
Author(s) -
Zimmerman R. L.,
Suchicital C.,
Fukada E.
Publication year - 1975
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1975.070190517
Subject(s) - electrostriction , piezoelectricity , dielectric , materials science , electric field , polymer , piezoelectric coefficient , pyroelectricity , polarization (electrochemistry) , composite material , permittivity , ferroelectricity , physics , chemistry , optoelectronics , quantum mechanics
Abstract An apparatus is devised for measuring the real and imaginary components of the piezoelectric strain constant d = d ′ − id ″ for polymer films with a d.c. bias field. Electric fieldinduced piezoelectricity is observed for films of several types of polymer. The ratio of the piezoelectric constant to the d.c. bias field gives (ϵ + κ)/ G where ϵ is the dielectric constant, κ is the electrostriction constant, and G is the elastic constant. The temperature dependence of the field‐induced piezoelectricity gives, therefore, combined information of dielectric and elastic properties of polymers. After heating to about 95°C followed by cooling to room temperature, maintaining a constant d.c. basis on a poly(vinyl chloride) film, piezoelectricity is observed at null d.c. field, which suggests the introduction of a residual polarization in the films.