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Table 2 Cross model coefficients to model the viscosity of Polypropylene (PP) in Fig. 6

From: Shape design for polymer spin packs: modeling, optimization and validation

zero-shear-rate viscosity \(\eta_{0}\) 6421.8 Pa s
time constant λ 0.6304 s
power-law index n 0.4276
activation energy α 3742.5 K
reference temperature \(T_{\mathrm{alpha}}\) 473.16 K