Abstract
The experimentally detected difference in the behavior of the high- and low-frequency limiting elastic moduli in high-viscosity fluids that have almost spherical (isotropic) and elongated (anisotropic) molecules and can easily be supercooled and vitrified is discussed. This difference is shown to be related to anisotropy-tensor fluctuations. The observed characteristic temperature dependence of the relaxation time of the anisotropy tensor is explained, and the cause of the linear temperature dependence of the limiting elastic moduli in such fluids is revealed.
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Original Russian Text © K.V. Kovalenko, S.V. Krivokhizha, I.A. Chaban, 2009, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2009, Vol. 108, No. 5, pp. 993–1002.
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Kovalenko, K.V., Krivokhizha, S.V. & Chaban, I.A. Difference in the behavior of the limiting elastic moduli in high-viscosity fluids with different molecular anisotropies. J. Exp. Theor. Phys. 108, 866–873 (2009). https://doi.org/10.1134/S106377610905015X
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DOI: https://doi.org/10.1134/S106377610905015X