Eur. Phys. J. B 42, 309-319 (2004)
https://doi.org/10.1140/epjb/e2004-00386-3

Scaling the α-relaxation time of supercooled fragile organic liquids

¹ PMC, UMR 7602-CNRS, Case Postale 77, UPMC, 4 Place Jussieu, 75005 Paris, France
² Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
³ Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

Corresponding author: ^a cad@ccr.jussieu.fr

Received: 7 May 2004
Revised: 16 July 2004
Published online: 23 December 2004

Abstract

It was shown recently [1] that the structural α-relaxation time of supercooled o-terphenyl depends on a single control parameter , which is the product of a function of density , by the inverse temperature T ^-1. We extend this finding to other fragile glassforming liquids using light scattering data. Available experimental results do not allow to discriminate between several analytical forms of the function , the scaling arising from the separation of density and temperature in . We also propose a simple form for , which depends only on three material-dependent parameters, reproducing relaxation times over 12 orders of magnitude.