Abstract
Parameter C from the main glass-transition equation qτg = C according to Nemilov’s theory has the meaning of temperature bandwidth δ T g in which the freezing of the structure of the glass-forming liquid occurs (where q is the cooling rate of a melt and δg is the time of structural relaxation at the glass-transition temperature). The currently used method to estimate C results in inflated values, a circumstance that is due to the assumption of the constancy of the activation energy of the glass transition in the derivation of the calculation formula. Methods of estimation of C that are in agreement with the experimental data have been considered. A calculation of the time of structural relaxation, δg, on the basis of the values of the parameters of the Williams–Landel–Ferry equation has been proposed.
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Original Russian Text © D.S. Sanditov, M.V. Darmaev, V.V. Mantatov, 2016, published in Vysokomolekulyarnye Soedineniya. Ser. A, 2016, Vol. 58, No. 2, pp. 218–222.
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Sanditov, D.S., Darmaev, M.V. & Mantatov, V.V. Estimation of the parameter of the main equation of the glass transition of amorphous polymers and other amorphous substances. Polym. Sci. Ser. A 58, 302–306 (2016). https://doi.org/10.1134/S0965545X16020176
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DOI: https://doi.org/10.1134/S0965545X16020176