Four QSPR models used for predicting viscosity of PNCs are selected and evaluated with approximately 200 theoretical data sets at different temperatures, shear rates and nanoparticles loading to screen for the best model. (The value of  was equaled to 19.8%) The decrease in  with the increase of  is the sign of shear thinning behavior in PNC fluids. As expected, the  of PNC fluids decrease with an increase in T for small  , which is related to the rise in T increases the dynamics of molecular chains and weakens the effect of inter-molecular chain entanglements. The dependence of  on T reduced significantly with increasing  . As shown in ure 4(a), a strong T -dependence was observed in low  and decreases significantly with the increase in  up to the point that it is not clear in high  (the value of  was greater than 0.1), which is probably related to that the complete destruction of the microstructure.