Method for processing polyolefins at high shear rates

摘要

Processing, particularly extruding polyolefins having low MI, narrow MWD at extrusion temperatures less than about 200 DEG C. and at shear rates less than about 2000 sec-1 but immediately above the shear rate corresponding to the end of the slipstick region of the polyolefin produces a new window of processing conditions to produce smooth polymers that do not have sharkskin melt fracture or wavy surfaces.