Pinning of phase separation in a model of binary polymer blends

The phase-ordering kinetics of a homopolymeric binary mixture is studied nu merically in the framework of the Flory-Huggins-de Gennes continuum model. For deep quenches the suppression of the evaporation-condensation mechanism leads to slower growth, due to transport of molecules along the interfaces . When the concentration of the minority phase is low all growth mechanisms are suppressed and the system exhibits a temporary stop in the separation kinetics.