Electric‐field‐induced phase changes in poly(vinylidene fluoride)
作者:
G. T. Davis,
J. E. McKinney,
M. G. Broadhurst,
S. C. Roth,
期刊:
Journal of Applied Physics
(AIP Available online 1978)
卷期:
Volume 49,
issue 10
页码: 4998-5002
ISSN:0021-8979
年代: 1978
DOI:10.1063/1.324446
出版商: AIP
数据来源: AIP
摘要:
The antipolar crystal form of poly(vinylidene fluoride) can be made piezoelectric and pyroelecric by the temporary application of electric fields in excess of 1 MV/cm at room temperature. Infrared and x‐ray diffraction data reveal that the polarization occurs in two stages. At fields near 1 MV/cm, a phase transition to a polar form II occurs with presumably no change in chain conformation. Fields near 5 MV/cm cause a change in conformation to produce form I. Our results indicate that at least a portion of the residual polarization occurs within the crystal phase of the polymer.
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