The curing characteristics and mechanical properties of natural rubber/polypropylene
blends were investigated with the aim of improving tensile strength. Two different types of
filler were tested: carbon black and reclaimed rubber. It was found that, the increasing carbon
black compositions improve the tensile strength of the NR/PP blends. Reclaimed rubber
shows beneficial effect by increasing the scorch time and decreasing the cure time of the NR/
PP blends. And the use of reclaimed rubber results in compositions of improved elasticity
and tensile mechanical performance.