Modeling the Shear Viscosity Function of Filled Polymer Systems

2 Modeling the Shear Viscosity Function of Filled Polymer Systems 

By combining two Carreau-Yasuda equations, an eight parameter model is obtained that would meet all the likely typical features of the shear viscosity behavior of filled polymer systems. 

The (very) low shear plateau is accounted for by parameter Tjoi and the high shear thinning region is depending on the flow index n2. 

Nonhydrodynamic effects of filler particles (e.g., filler networking) dominate the low shear behavior in such a manner that an apparent yielding region overrides the pseudo-Newtonian plateau of the polymer matrix (corresponding to parameter TI02) 

The critical shear rate y, corresponds to a critical characteristic time A few mathematical aspects of the model  

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Modeling the shear viscosity function of filled polymer systems by combining two Carreau-Yasuda equations the curve was calculated with the following model parameters Tioj = 8x10 Pa.s X = 500 s Aj = 1.9 = 0.4 rioj = 3x10 Pa.s - O l s = 3 Wj = 0.33. 

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