| In this thesis, by using time-resolved small angle light scattering and optical microscopy, the phase separation of hollow glass beads filled polystyrene and poly (vinyl methyl ether) blends are studied. Combined with the phase structure of polymer composites, the thermodynamics and the dynamics of glass beads filled PS/PVME system are discussed.The turbidity curve of PS/PVME blends is determined by the decrease of transmittivity. The PS/PVME system shows the existence of a lower critical solution temperature (LCST) Tc=99℃ at the critical composition of PS, ωPS=20wt%. After temperature jump, the phase separation of PS/PVME system with critical composition is spinodal decomposition. In the early stage of phase separation, the kinetics of spinodal decomposition obeys linearized Cahn-Hilliard theory and in thelate stage, the phase behavior can be explained with the dynamic scaling law and the principle of self-similar. However, due to the polydispersity of molecular weight of PS and PVME, the scaling index is different from the ideal values.
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