%0 Journal Article %T Unique microstructure analysis of ethylene-propylene copolymer synthesized using catalytic system based on α-diimine nickel complexes: a comparative study by 13 C NMR technique %A Hamid Pourtaghi Zahed %A Zohuri, Gholamhossein %A Saeid Ahmadjo %J Journal of Polymer Research %@ 1022-9760 %D 2014