| abstract |
The present invention describes a process for increasing the melting power and / or low shear viscosity of a polyethylene resin, the process comprising: a) providing a first polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers, the polyethylene composition being characterized in that it has the following properties: a density ranging from 0.900 g / cm3 to 0.970 g / cm3, a distribution of molecular weights (Mw / Mn) ranging from 2.6 to 3.5, and from 0.1 to 0.27 vinyl groups for a total of 1000 carbon atoms; b) preparing a masterbatch composition comprising a free radical generator and a polyethylene resin, the free radical generator having a half-life at 220 ° C of less than 200 seconds, and a decomposition energy greater than - 250 kJ / mol, and the polyethylene resin having a density ranging from 0.900 g / cm 3 to 0.970 g / cm 3, a melt index ranging from 0.01 g / 10 min to 100 g / 10 min; and c) reacting the polyethylene composition with the masterbatch composition to form a modified polyethylene composition. |