Electrode poling of cellular polypropylene films with short high-voltage pulses

R. Gerhard-Multhaupt, M. Wegener, W. Wirges, J.A. Giacometti, R.C. Altafim, L.F. Santos, R.M. Faria, Mika Paajanen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Recently, piezoelectric cellular polypropylene (PP) was proposed as a new type of quasi-ferroelectric. The observed hysteresis of the charge density as a function of the electric field could be explained as field-dependent charging inside the gas-filled voids. Interestingly enough, the measurable poling behavior of the macroscopic "dipoles" formed by charges that are trapped at the internal void surfaces is phenomenologically completely identical to the cooperative poling behavior of microscopic molecular dipoles in ferroelectric polymers. Therefore, it can be assumed that charge separation (or charge redistribution) and subsequent trapping in cellular PP is a rather fast "switching" process. In order to examine the poling dynamics, we developed an experimental setup for pulsed poling. High-voltage pulses with a duration of 45 /spl mu/s (FWHM) were applied in direct contact to two-side metallized cellular PP films. The pulsed poling yields piezoelectricity in the cellular PP. We study and discuss the dependence of the resulting piezoelectricity on the poling field. We also characterize the charge separation during application of higher electric poling fields of up to -10 kV in direct contact to the two-side metallized films for longer times.
Original languageEnglish
Title of host publicationAnnual report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP02
Subtitle of host publicationCancun, Quintana Roo, Mexico, 20-24 October 2002
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages299-302
ISBN (Print)0-7803-7502-5
DOIs
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication

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    Gerhard-Multhaupt, R., Wegener, M., Wirges, W., Giacometti, J. A., Altafim, R. C., Santos, L. F., Faria, R. M., & Paajanen, M. (2002). Electrode poling of cellular polypropylene films with short high-voltage pulses. In Annual report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP02 : Cancun, Quintana Roo, Mexico, 20-24 October 2002 (pp. 299-302). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/CEIDP.2002.1048794