| abstract |
The present invention provides a polyethylene composition having a polydispersity of 3 or less, an average branching degree (g ') as measured by GPC / V ≥ 0.9 and a melt strength (MS) (centipoise, 190 ° C) satisfying the following formula: to be:n n n MS≥ 3.0 / melt index (2.16kg / 190 ℃) + 4.5n n n In a preferred embodiment, these polyethylene compositions comprise A) branched polyethylene copolymers prepared by interposition polymerization of ethylene, ethylene containing macromonomers and optionally addition copolymerizable monomers and B) essentially linear ethylene copolymers. Improved melt strength is exhibited by the compositions of the present invention without sacrificing the benefit of narrow polydispersity. |