Rheology of Polymer Blends Exhibiting LCST

Composition-dependent cloud points ( ) determined from light scattering and glass transition temperatures Tgj (O), (A), and 

Reprinted from Kim et al., Macromolecules 31 8566. Copyright 1998, with permission from the Ammcan Chemical Society. 

In view of the fact that a binodal curve constructed from equilibrium thermodynamics (i.e., from the Flory-Huggins theory) determines the boundary between the homogeneous and inhomogeneous regions in a mixture of two liquids, the presence of microheterogeneity discussed above in this and preceding sections for PS/PaMS and PS/PVME blend systems may be attributable to dynamic composition fluctuations near the critical point. However, the extent of dynamic composition fluctuations would vary with blend system. 

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