In particular, the Tmax value of the Z-2 compound
was improved by 0.09 Nm, and t10 and t90 decreased
by 15 and 29 s, respectively, compared to those of
the Z-1 compound. A value of 1.0 phr was the content
of nano-ZnO that had the most excellent t90
under the conditions exceeding the Tmax value of the
Z-1 compound.