Ultrahigh field induced strain and polarization response in electron irradiated poly(vinylidene fluoride-trifluoroethylene) copolymer

    Authors

    V. Bharti; X. Z. Zhao; Q. M. Zhang; T. Romotowski; F. Tito;R. Ting

    Comments

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    Abbreviated Journal Title

    Mater. Res. Innov.

    Keywords

    polymers; PVDF-TrFE; electron irradiation; dielectric constant; Vogel-Fulcher law; strain; polarization; electrostriction; elastic; modulus; elastic energy density; VINYLIDENE FLUORIDE; RELAXOR FERROELECTRICS; TRANSITION; CRYSTALS; Materials Science, Multidisciplinary

    Abstract

    The influence of electron dosage on the field induced strain, dielectric constant, and polarization response has been investigated in electron irradiated poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) 50/50 copolymer. It was found that under suitable electron dosage an ultrahigh electrostrictive strain can be achieved. Interestingly, material after irradiation exhibits many features resembling those of relaxer ferroelectrics, suggesting that the electron irradiation breaks up the coherent polarization domain in normal ferroelectric P(VDF-TrFE) copolymer into nano-polar regions that transform the material into a relaxer ferroelectric. In addition, many of the material properties including the field induced polarization, the electrostrictive strain, and elastic modulus exhibit irregular change (non-monotonical) with electron dosage, indicating a complex relation among the crosslinking density, crystallinity, crystallite size, and molecular conformation in determining the material responses.

    Journal Title

    Materials Research Innovations

    Volume

    2

    Issue/Number

    2

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    57

    Last Page

    63

    WOS Identifier

    WOS:000076666100001

    ISSN

    1432-8917

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