Heterogeneous coupled dissipation modeling of volume and enthalpy recovery in glass systems

Wang, CJ; He, J; Ying, XN; Huang, YN; Riande, E
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS 2005, 242, 1254-1266

The dynamics of volume and enthalpy recovery of glasses are studied by introducing a new fictive temperature form and the size distribution of the solid-like clusters into the original heterogeneous coupled dissipation model. The renewed model gives a satisfactory description of the pertinent experiments. The present model is also compared with the successful Kovacs-Aklonis-Hutchinson-Ramos and the Tool-Narayanaswamy-Moynihan models. It is found that the parameters describing the non-linearity and nonexponentiality of the recovery in these two models are related with the heterogeneity of glass-formers