of fillers and reinforcing agents, and ability to produce blends with other polymers including rubbers makes PP versatile [3-4]. Fillers are incorporated into polymer matrix mainly to achieve improvement of service properties or to reduce the material cost. Ismail and Suryadiansyah studied the effects of filler loading on tensile properties of PP-NR-RR composites. The results indicated that the tensile strength increase with increasing carbon black [5]. The effect of partial replacement of natural rubber (NR) by reclaimed rubber (RR) in natural rubber/polypropylene (NR/ PP) thermoplastic elastomer blends was investigated. It is shown that replacement of up to half of the NR by RR is possible without altering the mechanical properties of the blend to any significant extent. Furthermore, the behavior of RR-NR/PP blends was similar to that of NR/PP on remolding; both systems retained their mechanical properties for up to four remolding cycles at 180 oC [6]. Recycled rubber (RR) was used to prepare polypropylene (PP)/RR blends with different RR content. A similar series of blends using natural rubber was also prepared. The results indicated that at 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 [7].