The complex viscosity of ENR/PLA blends as a function offrequency is shown in Fig. 8. It is obvious that at low frequency region(<1 rad/s), pure PLA exhibits a more pronounced Newtonianresponse and more extended Newtonian plateau compared with5 wt% ENR20/PLA and ENR50/PLA blends, while ENR20/PLA andENR50/PLA containing 20 wt% rubber show very strong shear thinningtendencies, in which viscosity decreases with increasing frequency.
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