In various embodiments, a bimodal polyethylene composition may have a density (ρ) from 0.952 g/cm.sup.3 to 0.957 g/cm.sup.3, a high load melt index (I.sub.21) from 1 to 10 dg/min, and a z-average molecular weight (M.sub.z(GPC)) from 3,200,000 to 5,000,000 g/mol. The bimodal polyethylene composition may also have a peak molecular weight (M.sub.p(GPC)) defined by the equation: M.sub.p(GPC)<−2,805.3 MWD+102,688, wherein MWD is a molecular weight distribution defined by the equation: MWD=M.sub.w(GPC)/M.sub.n(GPC), M.sub.w(GPC) is a weight average molecular weight of the bimodal polyethylene composition, M.sub.n(GPC) is a number average molecular weight of the bimodal polyethylene composition. Additionally, the bimodal polyethylene composition has a ratio of the (Mz(GPC)) to the Mw(GPC) from 8.5 to 10.5. Articles made from the bimodal polyethylene composition, such as articles made by blow molding processes, are also provided.

In various embodiments, a bimodal polyethylene composition may have a density (ρ) from 0.952 g/cm.sup.3 to 0.957 g/cm.sup.3, a high load melt index (I.sub.21) from 1 to 10 dg/min, and a z-average molecular weight (M.sub.z(GPC)) from 3,200,000 to 5,000,000 g/mol. The bimodal polyethylene composition may also have a peak molecular weight (M.sub.p(GPC)) defined by the equation: M.sub.p(GPC)<−2,805.3 MWD+102,688, wherein MWD is a molecular weight distribution defined by the equation: MWD=M.sub.w(GPC)/M.sub.n(GPC), M.sub.w(GPC) is a weight average molecular weight of the bimodal polyethylene composition, M.sub.n(GPC) is a number average molecular weight of the bimodal polyethylene composition. Additionally, the bimodal polyethylene composition has a ratio of the (Mz(GPC)) to the Mw(GPC) from 8.5 to 10.5. Articles made from the bimodal polyethylene composition, such as articles made by blow molding processes, are also provided.

Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 μm and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm.sup.3, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 μm and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm.sup.3, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

Methods for controlling the productivity of an olefin polymer in a polymerization reactor system using a halogenated hydrocarbon compound are disclosed. The productivity of the polymer can be increased via the addition of the halogenated hydrocarbon compound.

Methods for controlling the productivity of an olefin polymer in a polymerization reactor system using a halogenated hydrocarbon compound are disclosed. The productivity of the polymer can be increased via the addition of the halogenated hydrocarbon compound.

Embodiments of a method for producing a multimodal ethylene-based polymer having a first, second, and third ethylene-based component, wherein the multimodal ethylene based polymer results when ethylene monomer, at least one C.sub.3-C.sub.12 comonomer, solvent, and optionally hydrogen pass through a first solution, and subsequently, a second solution polymerization reactor. The first solution polymerization reactor or the second solution polymerization reactor receives both a first catalyst and a second catalyst, and a third catalyst passes through either the first or second solution polymerization reactors where the first and second catalysts are not already present. Each ethylene-based component is a polymerized reaction product of ethylene monomer and C.sub.3-C.sub.12 comonomer catalyzed by one of the three catalysts.

Embodiments of a method for producing a multimodal ethylene-based polymer having a first, second, and third ethylene-based component, wherein the multimodal ethylene based polymer results when ethylene monomer, at least one C.sub.3-C.sub.12 comonomer, solvent, and optionally hydrogen pass through a first solution, and subsequently, a second solution polymerization reactor. The first solution polymerization reactor or the second solution polymerization reactor receives both a first catalyst and a second catalyst, and a third catalyst passes through either the first or second solution polymerization reactors where the first and second catalysts are not already present. Each ethylene-based component is a polymerized reaction product of ethylene monomer and C.sub.3-C.sub.12 comonomer catalyzed by one of the three catalysts.

Embodiments of a method of producing a multimodal ethylene-based polymer comprising a first catalyst and a second catalyst in a first solution polymerization reactor and a third catalyst in a second solution polymerization reactor.

Embodiments of a method of producing a multimodal ethylene-based polymer comprising a first catalyst and a second catalyst in a first solution polymerization reactor and a third catalyst in a second solution polymerization reactor.