The effect of the comonomer in the copolymerization of ethylene with 1-hexene using late transition metal catalyst

The ethylene copolymerization with longer α-olefins is important category of polyolefins in comparison to homopolymerization of ethylene. In this work, ethylene was copolymerized with 1-hexene using late transition metal catalyst in combination with methylaluminoxane (MAO). The effects of comonomer concentration on activity and thermal properties of ethylene/1-hexene copolymers with (2,6- Diacetylpyridinebis(2-tert-butylanil)) iron (II) dichloride catalyst was studied. The results revealed that the polymerization activity was increased by introducing the comonomer and then further increase of the comonomer concentration leads to decrease in activity. The results were indicated that by increasing of comonomer content the crystallinity of copolymers were decreased