Electron irradiated p(VDF-TrFE) copolymers for use in naval transducer applications

T. Ramotowski, K. Hamilton, G. Kavarnos, Qiming Zhang, V. Bharti

    Research output: Contribution to journalArticle

    Abstract

    Recently, it was discovered that the transduction/strain capability of p(VDF-TrFE) copolymers can be enhanced by more than an order of magnitude by irradiating the copolymer with large doses (40-300 Mrads) of β-particles (1-3 MeV electrons). The goal of this project is to understand how irradiation improves the electromechanical properties of p(VDF-TrFE) copolymers while simultaneously identifying the secondary effects of the irradiation process on the material (not critical to the electromechanical properties) and attempting to separate the two contributions. It has been found that β-irradiation affects the material profoundly in several different manners. Reduction in the melt temperature, degree of crystallinity, and the resulting crystal quality have been observed for increasing doses of β-particles. Similar results have been observed for the Curie transition, especially in the energy associated with, and the breadth of, the transition. In addition, thermogravimetric analysis indicates that irradiation causes both chain scission and network polymer formation. Solid-state NMR results are discussed in reference to postulated dehalogenation, dehydrohalogenation, and olefinic bond formation activities.

    Original languageEnglish (US)
    Pages (from-to)77-82
    Number of pages6
    JournalMaterials Research Society Symposium - Proceedings
    Volume600
    StatePublished - 2000

    Fingerprint

    Transducers
    copolymers
    transducers
    Copolymers
    Irradiation
    irradiation
    Electrons
    electrons
    Dehalogenation
    Strategic materials
    dosage
    Thermogravimetric analysis
    cleavage
    crystallinity
    Polymers
    Nuclear magnetic resonance
    solid state
    nuclear magnetic resonance
    Crystals
    causes

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials

    Cite this

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    abstract = "Recently, it was discovered that the transduction/strain capability of p(VDF-TrFE) copolymers can be enhanced by more than an order of magnitude by irradiating the copolymer with large doses (40-300 Mrads) of β-particles (1-3 MeV electrons). The goal of this project is to understand how irradiation improves the electromechanical properties of p(VDF-TrFE) copolymers while simultaneously identifying the secondary effects of the irradiation process on the material (not critical to the electromechanical properties) and attempting to separate the two contributions. It has been found that β-irradiation affects the material profoundly in several different manners. Reduction in the melt temperature, degree of crystallinity, and the resulting crystal quality have been observed for increasing doses of β-particles. Similar results have been observed for the Curie transition, especially in the energy associated with, and the breadth of, the transition. In addition, thermogravimetric analysis indicates that irradiation causes both chain scission and network polymer formation. Solid-state NMR results are discussed in reference to postulated dehalogenation, dehydrohalogenation, and olefinic bond formation activities.",
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    Electron irradiated p(VDF-TrFE) copolymers for use in naval transducer applications. / Ramotowski, T.; Hamilton, K.; Kavarnos, G.; Zhang, Qiming; Bharti, V.

    In: Materials Research Society Symposium - Proceedings, Vol. 600, 2000, p. 77-82.

    Research output: Contribution to journalArticle

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    AU - Ramotowski, T.

    AU - Hamilton, K.

    AU - Kavarnos, G.

    AU - Zhang, Qiming

    AU - Bharti, V.

    PY - 2000

    Y1 - 2000

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