Rheology of Polymer Blends Exhibiting UCST

we consider the rheological behavior of PS/PaMS blends exhibiting UCST. The miscibility and phase behavior of PS/PaMS blends have been studied (Cowies and McEwen 1985 Lau et al. 1982 Lin and Roe 1987, 1988 Rameau et al. 1989 Saeki et al. 1983 Schneider andDilger 1989 Wimpier and Maynard 1987) and the miscibility window of PS/PaMS blends has been found to be very sensitive to the molecular weights of the constituent components. We next consider the phase behavior and linear dynamic viscoelastic properties of three pairs of PS/PaMS blends, each having different molecular weights, as summarized in Table 7.1. 

R rinted from Kim et al., Macromolecules 31 8566. Copyright 1998, with permission from the AmCTican Chemical Society. 

Let us examine whether TTS is applicable to the (PS-40)/(PoMS-18) blend system, which gives rise to virtually temperature-independent log G versus log G plots with 

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