In this paper, considering the problem of selecting the most appropriate ethylene propylene diene termonomer (EPDM), which is a polyolefin with variety of usages in different areas. The metallocene catalyst, bis (2‐phenyl indenyl) zirconium dichloride [(2‐PhInd)2ZrCl2] was synthesized as modified method and applied in the terpolymerization of ethylene, propylene and 5‐ ethylidiene‐2‐norbornene, (ENB). The Methylaluminoxane (MAO) was used as co catalyst. It showed appropriate activity, high incorporation ability of the co monomers and good workup in terpolymerization. The compounded EPDM showed good thermal stability with time. The proper criteria were chosen for the selection of the best EPDM, and a hybrid of analytical hierarchy process (AHP) and preference ranking organization method for enrichment evaluations (PROMETHEE) used for prioritizing 15 different synthesized EPDM polymers. The sensitivity and GAIA analysis are also performed. Finally one of the polymers which has a very high quality and moderate yield, cost, and curing time was selected.

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