are the observed and predicted viscosities at a given temperature (Ti) and shear rate (g_ j). which represents the sum of the Chi-square errors across temperature (i) and shear rate (j).The fitting was made setting A2 and D3 as 51.6 K and 0 respectively [27], and allowing the variation of n, t*, D1, D2 and A1. The adjustment between the predicted and observed data was made, obtaining a correlation value close to 1.