Nucleation/Growth in the Metastable and Unstable Phase Separation Regions under Oscillatory Shear Flow for an Off-critical Polymer Blend

摘要

After some important advancement~(1-7) were obtained in the phase separation of polymer blends in static conditions, researchers gradually turned their attention toward the area of phase transitions under shear field in recent years.8-12 Light scattering and neutron scattering were frequently used to investigate the shear induced mixing phenomenon.~(8,12) However, most of these studies~(8-12) were focused on the steady state of the phase boundary shift, either at critical or off-critical compositions, under simple or oscillatory shear field. There were few studies reporting the kinetics of phase transitions under a shear field.~(13)