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
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.
PACS: 66.20.+d – Viscosity of liquids; diffusive momentum transport / 78.35.+c – Brillouin and Rayleigh scattering; other light scattering / 64.70.Pf – Glass transitions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004