The viscosities and primary normal stress coefficients are presented for well characterized, rubber‐modified polystyrene as a function of shear rate, temperature, rubber phase volume fraction, and molecular weight. From these data, melt relaxation times and shear compliances are calculated and related to the polystyrene matrix molecular weight and rubber phase volume fraction. The matrix and rubber‐modified melt compliance data are compared to values predicted from molecular and continuum theories.
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© 1980 The Society of Rheology.
1980
The Society of Rheology
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