This might be
attributed to the better dispersion of the OC-18C
in the NR matrix (as evidenced in Figs. 6 and 7). Also, the
higher crosslinking density (based on higher torque difference
in Fig. 8) enhances the mechanical properties of
nanocomposites. On the other hand, the DO-12C and TET-
14C had poor dispersion in the natural rubber matrix.