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Effect of pressure on the dynamics of glass formers
R Casalini1, S Capaccioli, M Lucchesi
1INFM e Dipartimento di Fisica, Università di Pisa, Via Buonarroti 2, I-56127 Pisa, Italy. riccardo.casalini@df.unipi.it
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 3, 2001
Abstract:
A description of the pressure dependence of the structural relaxation time has been derived from the Adam-Gibbs theory by writing the configurational entropy in terms of the excess heat capacity and the molar thermal expansion. This new equation was tested successfully on dielectric relaxation data for an epoxy compound over a wide range of temperature and pressure.