| abstract |
A copolymer of ethylene and one or more alpha olefins containing from three to twenty carbon atoms, said copolymer having: (a) a flow activation energy, Ea, of a value greater than or equal to 40 kJ / mol, in where Ea is measured by dynamic rheometry, and (b) a value of the derived function δ (MS) / δ (log γ) and Mw / Mn that satisfy the relationship: where Mw / Mn is the ratio of the average molecular weight in Weight by number average molecular weight measured by gel chromatography, MS is the melt strength of the copolymer in cN and γ is the tear rate of the copolymer tear in sec-1. |