Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids

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    Resumé

    A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.
    OriginalsprogEngelsk
    TidsskriftPhysical Review B. Condensed Matter and Materials Physics
    Vol/bind53
    Udgave nummer5
    Sider (fra-til)2171-2174
    ISSN1098-0121
    StatusUdgivet - 1996

    Citer dette

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    title = "Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids",
    abstract = "A model for the viscosity of glass-forming molecular liquids is proposed in which a {"}flow event{"} requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.",
    author = "Jeppe Dyre and Olsen, {Niels Boye} and Christensen, {Tage Emil}",
    year = "1996",
    language = "English",
    volume = "53",
    pages = "2171--2174",
    journal = "Physical Review B",
    issn = "2469-9950",
    publisher = "American Physical Society",
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    TY - JOUR

    T1 - Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids

    AU - Dyre, Jeppe

    AU - Olsen, Niels Boye

    AU - Christensen, Tage Emil

    PY - 1996

    Y1 - 1996

    N2 - A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

    AB - A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

    M3 - Journal article

    VL - 53

    SP - 2171

    EP - 2174

    JO - Physical Review B

    JF - Physical Review B

    SN - 2469-9950

    IS - 5

    ER -