POLYMER RESINS WITH IMPROVED PROCESSABILITY AND MELT FRACTURE CHARACTERISTICS

摘要

A metallocene-catalyzed polymer comprising (i) a higher molecular weight component and (ii) a lower molecular weight component wherein the polymer has a polydispersity index of from about 10 to about 26; a zero shear viscosity of from about 5x105 Pa.s to about 2x1014 Pa.s and a smooth-to-matte transition critical stress of from about 20 kPa to about 85 kPa at a shear rate of from about 1.5 s-1 to about 17 s-1. A dual metallocene catalyzed polyethylene comprising (i) a higher molecular weight component and (ii) a lower molecular weight component wherein the polymer has a polydispersity index of from about 10 to about 26; a zero shear viscosity of from about 5x105 Pa.s to about 2x1014 Pa.s and a smooth-to-matte transition stress of from about 20 kPa to about 85 kPa at a shear rate of from about 1. 5 s-1 to about 17 s-1.