Abstract: Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.

Abstract: Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in Which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.

Abstract: A polymer of an alpha-olefin and at least one diene with low residual unsaturation and long chain branching and the process for preparing said polymer. The process comprises polymerizing an alpha-olefin (ethylene) with at least one diene in the presence of a coordination catalyst, the diene being selected from linear .alpha.,.omega.-dienes of at least eight carbon atoms (1,7-octadiene) and cyclic endomethylenic dienes (bicyclo(2,2,1)-2-5-heptadiene, dinorbornene), the diene being characterized in that each one of the two double bonds is readily polymerizable.