Process for improving processability of ultra low melt viscosity polymer

摘要

A process is disclosed for making polymer pellets comprising unreacted free radical generator which can be degraded upon thermal treatment to form an ultra low melt viscosity polyolefin, which process comprises the steps of adding polyolefin and free radical generator required for the degradation in the extruder to the first half section of an extruder and injecting, optionally through a side-arm extruder, another portion of free radical generator near the exit of the extruder to provide a sufficient amount of unreacted free radical generator in the pellets produced, followed by pelletizing the resulting molten mixture to form uniform non-sticky pellets.