Experimental Observations of Rheology-Morphology Relationships in Immiscible Polymer Blends

Experimental Observations of Rheology-Morphology Relationships in Immiscible Polymer Blends 

1 Effect of Flow Geometty on the Steady-State Shear Viscosity and Morphology of Immiscible Polymer Blends 

However, for convenience, throughout this chapter we use the notations y V interchangeably with the notations y pp and for both homopolymers and immiscible 

The second difficulty associated with the use of a plunger-type capillary rheometer to calculate the a of dispersed two-phase polymer blend lies in the use of the following expression  

What is the alternative The answer clearly lies in the use of a continuous-flow capillary (or slit) rheometer, which makes use of wall normal stress measurements in the fully developed region of a capillary (or slit) die (see Chapter 5). That is, as long as the wall normal stresses along the axis of a die are linear (i.e., in the fully developed region), a can be calculated from 

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