M Frahani - Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran.
Y Jahani - Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran.
H Arabi - Department of Catalyst, Iran Polymer and Petrochemical Institute, Tehran, Iran.
S Ahmadjo - Department of Catalyst, Iran Polymer and Petrochemical Institute, Tehran, Iran.

Polypropylene (PP), as a linear polyolefin, is widely using in various applications due to their good mechanical properties and attractive price. The impact strength of PP can beimproved through an in-reactor alloying process. In this research, the PP/EPR in reactor alloys are produced by amodified sequential copolymerization process and their mechanical and thermal properties are evaluated consequently