High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer

Jing Wen Wang, Qun Dong Shen, Chang Zheng Yang, Qi Ming Zhang

    Research output: Contribution to journalArticle

    91 Citations (Scopus)

    Abstract

    Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt % CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.

    Original languageEnglish (US)
    Pages (from-to)2294-2298
    Number of pages5
    JournalMacromolecules
    Volume37
    Issue number6
    DOIs
    StatePublished - Mar 23 2004

    Fingerprint

    Oligomers
    Permittivity
    Copper
    Composite materials
    Polymer matrix
    Nanocomposites
    Free radicals
    Grafts
    Free Radicals
    copper phthalocyanine
    trifluoroethene
    polyvinylidene fluoride
    Elastic moduli
    Polarization
    Transmission electron microscopy
    Temperature

    All Science Journal Classification (ASJC) codes

    • Organic Chemistry
    • Polymers and Plastics
    • Inorganic Chemistry
    • Materials Chemistry

    Cite this

    Wang, Jing Wen ; Shen, Qun Dong ; Yang, Chang Zheng ; Zhang, Qi Ming. / High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer. In: Macromolecules. 2004 ; Vol. 37, No. 6. pp. 2294-2298.
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    abstract = "Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt {\%} CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.",
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    High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer. / Wang, Jing Wen; Shen, Qun Dong; Yang, Chang Zheng; Zhang, Qi Ming.

    In: Macromolecules, Vol. 37, No. 6, 23.03.2004, p. 2294-2298.

    Research output: Contribution to journalArticle

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