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The longer the measuring point duration in the low-shear range, the greater is the chance to avoid transient effects.

Note: Uncrosslinked polymers in the form of solutions and melts usually show a constant

η-value in the low-shear range, which is the plateau value of the zero-shear viscosity η0 (see Chapter 3.3.2.1a, Figure 3.10). However, also here a “transient viscosity peak” might appear when presetting too short measuring point durations in this shear rate range.

End of the Cleverly section

Figure 3.6: Flow curve of a shear-thinning liquid

Figure 3.7: Viscosity curve of a shear-thinning liquid