ETHYLENE COPOLYMER COMPOSITIONS, FILM AND POLYMERIZATION PROCESSES

摘要

Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. Such polymers are produced from a gas phase single reactor process where a phosphinimine-ligated group IV metallocene catalyst is used. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures.