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Applied Physics Letters / Volume 94 / Issue 5 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 94, 052907 (2009); http://dx.doi.org/10.1063/1.3079332 (3 pages)

Fast discharge speed in poly(vinylidene fluoride) graft copolymer dielectric films achieved by confined ferroelectricity

Fangxiao Guan, Zhongzhe Yuan, Essay W. Shu, and Lei Zhu

Department of Chemical, Materials and Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3136, USA

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(Received 3 December 2008; accepted 10 January 2009; published online 6 February 2009)

Although a high electric energy density was recently reported for defect-modified poly(vinylidene fluoride) (PVDF) copolymers at millisecond discharge, they usually deliver less energy at a high pulse rate. In this letter, a low loss polystyrene (PS) was grafted as side chains onto the P(VDF-chlorotrifluoroethylene) main chain. After PVDF crystallization, dielectric PS side chains were segregated to the crystalline-amorphous interface, forming a finite confinement layer for ferroelectric PVDF crystals. We speculated that less space charge was induced during electric poling because of the nanoscale confinement effect. Consequently, a fast discharge speed and a relatively high energy density were achieved.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

crystallisation, dielectric polarisation, ferroelectric thin films, ferroelectricity, polymer blends, space charge

PACS

  • 77.55.-g

    Dielectric thin films

  • 77.80.-e

    Ferroelectricity and antiferroelectricity

  • 77.22.Ej

    Polarization and depolarization

  • 77.22.Jp

    Dielectric breakdown and space-charge effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3079332

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    H. von Seggern and S. N. Fedosov, Appl. Phys. Lett. 81, 2830 (2002)APPLAB000081000015002830000001.

    V. A. Stephanovich, I. A. Luk'yanchuk, and M. G. Karkut, Phys. Rev. Lett. 94, 047601 (2005).

    D. Rollik, S. Bauer, and R. Gerhard-Multhaupt, J. Appl. Phys. 85, 3282 (1999)JAPIAU000085000006003282000001.


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