Glassformer

What is the main feature distinguishing the dynamic behaviour of a glassforming system and a simple liquid Let us follow the time evolution of a given correlation function 4> t) of a glass former for different temperatures, as schematically shown in Fig. 4.1a. At a high temperature (e.g. above the 1 ), like Ti in the figure, 4> t) decays in a single step at times of the order of picoseconds - a behaviour expected for a simple liquid. If the system is cooled... 

The dynamic process driving the decay of the interchain correlations in glassforming polymers is the structural a-relaxation. The direct microscopic obser-... 

The glass was prepared by feeding an aqueous slurry of glassforming frit (SRP Frit 131) and waste (approximately 70 wt % frit on a dry basis) to a joule-heated melter in the shielded cells. 

To proceed further, we make use of the Adam-Gibbs model for the temperature dependence of relaxation time x(T) of cooperative rearranging regions in glassforming liquids [41]... 

As discussed in Section n, for monomeric organic and inorganic and glassforming liquids, the temperature dependence of heat capacity change is often described by hyperbolic temperature dependence [17,43] ... 

By a synthesis of the partition function for a supercooled liquid at some hctive temperature in the inherent structure formalism [ 1,4] with the configurational entropy obtained by restricting mrepiica replicas to be in the same state [161], Mohanty has uncovered a relationship between Parisi s replica symmetry-breaking parameter mrepiica(T), and the Narayanaswamy-Moynihan non-linear parameter x, a parameter that provides a metric on the deviation of the glassforming system from equilibrium [162] ... 

J.C. Mauro, A.K. Varshneya Ab initio modeling of volume-temperature curves for glassforming systems. J. Non-Crystalline Solids 353, 1226-1231 (2007)... 

T. Tokuda, T. Ito, and T. Yamaguchi, Self-Diffusion in a Glassformer Melt Oxygen Transport in Boron Oxide, Z. Naturforschung, 26A, 2058-2060 (1971). 

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