Universal representation of viscosity in glass forming liquids
1998; Elsevier BV; Volume: 223; Issue: 3 Linguagem: Inglês
10.1016/s0022-3093(97)00365-7
ISSN1873-4812
AutoresE. A. Rössler, Kai‐Uwe Hess, V. N. Novikov,
Tópico(s)Thermodynamic properties of mixtures
ResumoTemperature dependence of the viscosity η(T) of fragile and strong polymer and non-polymer glass formers was analyzed. A temperature Tx was introduced which marks the boundary between a high- and low-temperature regime, where different approaches are applied to interpolate η=η(T). At T Tx deviations from the master curves occur, and the Vogel–Fulcher–Tammann equation provides a very good fit to highest temperatures. The two master curves at T<Tx can be interpolated by several formulae.
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