Shear phase separation, partially miscible

Melt flow, however, also affects the phase separation, usually enhancing the miscibility for partially miscible blends that show LCST behavior. From Lyngaae-Jorgensen work (46) one may derive the following relation between the shear stress and the change in the spinodal temperature, T, ( ),... 

Even in the phase separated blends, where some degree of partial miscibility or compatibility exists between the components, simple melt blending in an intensive shear mixer is adequate for making a well dispersed, reasonably stable blend product with useful combination of properties, such as polypropylene/ethylene-propyl-ene rubber blend, ABS/polycarbonate blend, etc. The self-compatibUizing nature of these blends stems from partial miscibility and the mutual interpenetration of polymer chains at the interface. Slight modifications of the polymer backbone are often employed, particularly in the case of styrenic and ABS resins to induce partial miscibility with other resins. 

Table 1 Details of some of the partially miscible blends used for studying the effect of shear on phase separation ...

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