A similar
series of blends using natural rubber, SMR L (NR) was also prepared. The results indicated that at a similar rubber
content, PP/RR blends have higher, tensile strength and Young’s modulus but lower elongation at break and stabilization
torque than PP/NR blends. Scanning electron microscopy (SEM) examination of the tensile fracture surface of PP/RR
blends indicates that a higher energy is needed to cause catastrophic failure compared to PP/NR blends. 2002 Elsevier
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