On the pressure dependence of fragilityA. Reiser and G. Kasper
Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, D-69120 Heidelberg, Germany
received 17 May 2006; accepted in final form 30 October 2006
published online 23 November 2006
We have investigated the fragility of glycerol, propylene carbonate, and meta-fluoroaniline at pressures up to using dielectric spectroscopy. All three small-molecule glass formers do not show a pressure dependence of fragility within experimental error. The ratio of glass transition temperature and Vogel-Fulcher-Tammann temperature is pressure independent. The results are discussed in the frame of the defect diffusion model.
64.70.Pf - Glass transitions.
62.50.+p - High-pressure and shock wave effects in solids and liquids.
77.22.Gm - Dielectric loss and relaxation.
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