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Authors: Eberle, Gernot
Eisenmenger, Wolfgang
Title: Thermal depolarization of PVDF : anomaly at 180°C
Issue Date: 1991 Konferenzbeitrag Gerhard-Multhaupt, Reimund (Hrsg.): Proceedings / 7th International Symposium on Electrets (ISE 7) : Berlin 25-27 September 1991. New York, NY : IEEE, 1991, S. 477-482
Abstract: PVDF (polyvinylidene fluoride) samples with high β-content (80%), prepolarized at room temperature, were heated to higher temperatures. The polarization was measured first under open circuit conditions at the high temperature and then cooling down again to room temperature. For elevated temperatures up to 175°C the polarization is reduced to 2% of the original value, yet covers roughly to 8% of the original value after cooling down again to room temperature. In contrast, when heating up the films to 180°C a significantly different behavior was observed: in cooling down to room temperature the polarization returns from about 1% at 180°C to about 40% of the original prepolarized value.
Appears in Collections:08 Fakultät Mathematik und Physik

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