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Proceedings Paper

Characterization of electrostrictive P(VDF-TrFE) copolymer films for high-frequency and high-load applications
Author(s): Zhong-Yang Cheng; Tian-Bing Xu; Vivek Bharti; Tian X. Mai; Qi Ming Zhang; Thomas Ramotowski; Robert Y. Ting
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Paper Abstract

In order to characterize the electromechanical properties of newly developed electrostrictive poly(vinylidene fluoride- trifluorethylene) copolymers for practical device applications, the following results are presented: 1) The driving field amplitude dependence of the material response. It was found that M(S = ME2) exhibits the driving field amplitude dependence and that the apparent piezoelectric coefficient for the material under DC bias depends on both the driving field amplitude and DC field. 2) Load capability. The copolymer film has a high mechanical load capability. For example, the transverse strain remains 0.6% at 47MV/m under a tensile load of 45 MPA. The load dependence of the material response prove that the electric field induced strain in the copolymer films mainly originates from the electric field induced phase transition in the crystal regions. 3) Frequency dependence of the material response. Although the strain response decreases with increasing frequency, it is found that the strain response at 1 kHz can reach more than 80% of the response at 1Hz.

Paper Details

Date Published: 7 June 2000
PDF: 8 pages
Proc. SPIE 3987, Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD), (7 June 2000); doi: 10.1117/12.387765
Show Author Affiliations
Zhong-Yang Cheng, The Pennsylvania State Univ. (United States)
Tian-Bing Xu, The Pennsylvania State Univ. (United States)
Vivek Bharti, The Pennsylvania State Univ. (United States)
Tian X. Mai, The Pennsylvania State Univ. (United States)
Qi Ming Zhang, The Pennsylvania State Univ. (United States)
Thomas Ramotowski, Naval Undersea Warfare Ctr. (United States)
Robert Y. Ting, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 3987:
Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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