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Non-Electrical Poling in Novel Ferroelectric Polymers

Published online by Cambridge University Press:  10 February 2011

S. Tasaka ,
O. Furutani  and
N. Inagaki
S. Tasaka
Affiliation:
Department of Materials Science and Technology, Faculty of Engineering, Shizuoka University, Hamamatsu 432–8561, JAPAN
O. Furutani
Affiliation:
Department of Materials Science and Technology, Faculty of Engineering, Shizuoka University, Hamamatsu 432–8561, JAPAN
N. Inagaki
Affiliation:
Department of Materials Science and Technology, Faculty of Engineering, Shizuoka University, Hamamatsu 432–8561, JAPAN
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Abstract

Non-electrical poling was proposed in novel ferroelectric polymers including such as polythioureas, polycyanophenylenesulfides, and polyvinyfluorides. This poling method utilizing the cooperativity of molecular dipoles can be called “surface energy poling” and takes agvantage of the energy difference inthe top and bottom surface of apolar aggregate (dipole glass) to form a remanent polarization. A ferroelectric polymer film sandwiched between a metal with higher surface energy and PTFE film with lower surface energy were heated to Tp=Tc (glass tramsition temperature or ferroelectric transition) × 1.2 and cooled slowly to room temperature. In the thin films less than 10μm, we observed the remanent polarization which gives a large pyroand piezo-electric constant as well as that obtained by electrical poling. This poling is effective for homogenious structures such as amophous ferroelectric polymers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 600: Symposium FF – Electroactive Polymers , 1999 , 107
Copyright
Copyright © Materials Research Society 2000

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