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Start Over Author "Xie, Longtao" Journal applied physics letters
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2. Time dependence of piezoelectric d33 coefficient of cellular ferroelectret polypropylene film.

Author

Wan, Yongping, Xie, Longtao, Zhang, Xiaoqing, and Zhong, Zheng

Subjects
*PIEZOELECTRIC materials, *POLYPROPYLENE, *VISCOSITY, *POLYMERS, *MICROELECTROMECHANICAL systems, *VISCOELASTICITY, *THIN films
Abstract

Due to the inherent viscosity of polymer, piezoelectric response in the thickness direction (d33) of cellular ferroelectret films usually depends on the time of measurement. In this letter, the micromechanical theory of viscoelastic composite was extended to predict the time dependence of the overall piezoelectric d33 coefficient of voided charged polymer foam. Experiments were carried out to find the time spectra of piezoelectric d33 coefficient of voided charged polypropylene film. Theoretical simulation agrees well with experiment data. [ABSTRACT FROM AUTHOR]

Published
2011
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