A Process for Increasing the Melt Strength of a Polyethylene Resin, a Masterbatch Composition and a Polymeric Composition

A method for increasing the melt strength of a polyethylene resin comprising:

• a) selecting a polyethylene resin having
• i) a density, as determined according to ASTM D792, in the range of from 0.865 g/cm3 to 0.97 g/cm3, and
• ii) a melt index, I2, as determined according to ASTM D1238 (2.16 kg, 190° C.), in the range of from 0.01 g/10 min to 100 g/10 min;
• b) reacting from 10 ppm to 1000 ppm of at least one peroxide having a 1 hour half-life decomposition temperature from 160° C. to 250° C. with the polyethylene resin
• wherein the peroxide is added to the polyethylene resin as a masterbatch comprising the peroxide along with a carrier resin, and wherein the carrier resin is selected from polyethylenes having a vinyl concentration from 0.07 to 0.7 per 1,000 carbons in the backbone of the polymer.