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Temperature range of the liquid–glass transition

  • Polymers
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Abstract

It has been shown that the currently used method for calculating the temperature range of δT g in the glass transition equation qτ g = δT g as the difference δT g = (T 12–T 13) results in overestimated values, which is explained by the assumption of a constant activation energy of glass transition in deriving the calculation equation (T 12 and T 13 are the temperatures corresponding to the logarithmic viscosity values of logη = 12 and logη = 13). The methods for the evaluation of δT g using the Williams–Landel–Ferry equation and the model of delocalized atoms are considered, the results of which are in satisfactory agreement with the product qτ g (q is the cooling rate of the melt and τ g is the structural relaxation time at the glass transition temperature). The calculation of τ g for inorganic glasses and amorphous organic polymers is proposed.

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Authors and Affiliations

  1. Buryat State University, ul. Ranzhurova 6a, Ulan-Ude, 670000, Buryatia, Russia

    D. S. Sanditov, M. V. Darmaev & B. D. Sanditov

  2. Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, ul. Sakhyanovoi 8, Ulan-Ude, 670047, Buryatia, Russia

    D. S. Sanditov

Authors
  1. D. S. Sanditov
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  2. M. V. Darmaev
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  3. B. D. Sanditov
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Correspondence to D. S. Sanditov.

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Original Russian Text © D.S. Sanditov, M.V. Darmaev, B.D. Sanditov, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 2, pp. 372–376.

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Sanditov, D.S., Darmaev, M.V. & Sanditov, B.D. Temperature range of the liquid–glass transition. Phys. Solid State 58, 382–386 (2016). https://doi.org/10.1134/S1063783416020256

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  • DOI: https://doi.org/10.1134/S1063783416020256

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