As shown in Fig. 3, the storage modulus of NR-g-MAH
decreased in the first region compared to that of neat NR.
However, in this region, polypropylene grafted with maleic
anhydride exhibited higher values of E0 compared to those
of neat PP. The storage modulus of the blend where the two
components were modified NR-g-MAH/PP-g-MAH is lower
than that of the unmodified NR/PP blend. However, this
difference disappears above Tg where the curves
superimpose.