Pressure dependence of the glass temperature in supercooled liquids.
The description of the pressure evolution of the glass temperature Tg(p) based on experimental data for diethyl phtalate is discussed. First, parameterizations of Tg(P) experimental data applied are briefly given. Then a novel relation based on the modified Simon-Glatzel equation is proposed. Its applications may result in the appearance of the asymptotic temperature (theta) and the asymptotic pressure (pi) previously postulated [E. Donth,, Springer Series in Material Sci. II (Springer, Berlin, 1998), Vol. 48, pp. 6, 375]. The asymptotic pressure is hidden in the negative pressure domain. Such asymptotic behavior was absent for parameterizations of Tg(p) data in glassy liquids applied up to now.
Drozd-Rzoska
Aleksandra
A
Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland.