Spinodal decomposition with formation of a glassy phase
Faculty of Physics, University of Konstanz - Konstanz, Germany
Accepted: 16 November 1996
The consequences of a glass transition occurring in one of the two phases formed by spinodal decomposition of a liquid mixture are investigated by numerical solution of the deterministic Cahn-Hilliard equation for two dimensions with a concentration-dependent mobility. The glass transition is modelled by a rapid decrease of the mobility coefficient with increasing concentration of the glass-forming component. For concentrations of the mixture for which the glassy phase percolates and the liquid phase is confined in droplets, a new coarsening mechanism is found which consists in the migration and eventual coalescence of liquid droplets in the glassy phase. For a particular model of the mobility coefficient the growth law for the characteristic length R(t) shows a pronounced plateau at intermediate times.
PACS: 64.75.+g – Solubility, segregation, and mixing / 64.70.Pf – Glass transitions / 61.25.Hq – Macromolecular and polymer solutions; polymer melts
© EDP Sciences, 1997