Review Article
Measurement Techniques and Methods for the Pressure Coefficient of Viscosity of Polymer Melts
Table 3
Summary of pressure coefficients calculated from different methods.
| Pressure coefficient | Formula | Accuracy | Thermodynamic property | Relationship |
| Nonlinear pressure profiles | | Not reliable | No | | PVT | | At constant shear rate | | Reliable | At constant shear stress | | Yes | Superposition | | Zero shear rate | |
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