Embodiments are directed towards a use of a supported gas-phase biphenylphenol polymerization catalyst to make a polymer via a gas-phase polymerization process, wherein the supported gas-phase biphenylphenol polymerization catalyst is made from a gas-phase biphenylphenol polymerization precatalyst of Formula I.

Embodiments are directed towards a use of a supported gas-phase biphenylphenol polymerization catalyst to make a polymer via a gas-phase polymerization process, wherein the supported gas-phase biphenylphenol polymerization catalyst is made from a gas-phase biphenylphenol polymerization precatalyst of Formula I.

The copolymerization of ethylene with an optional comonomer is conducted in the presence of a catalyst having a specific aryloxy ether ligand structure. The process enables very high conversions of ethylene to polyethylene at very short residence times when conducted under conditions of pressures of at least 10.3 MPa and high ethylene feed concentrations of from 70 to 150 grams per liter.

The copolymerization of ethylene with an optional comonomer is conducted in the presence of a catalyst having a specific aryloxy ether ligand structure. The process enables very high conversions of ethylene to polyethylene at very short residence times when conducted under conditions of pressures of at least 10.3 MPa and high ethylene feed concentrations of from 70 to 150 grams per liter.

Embodiments of polymer compositions and articles comprising such compositions contain at least one multimodal ethylene-based polymer having at least three ethylene-based components, wherein the multimodal ethylene-based polymer exhibits improved toughness.

Embodiments of polymer compositions and articles comprising such compositions contain at least one multimodal ethylene-based polymer having at least three ethylene-based components, wherein the multimodal ethylene-based polymer exhibits improved toughness.

The present disclosure provides a process. In an embodiment, the process includes providing a purge stream containing octene monomer. The process includes contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst, and forming an octene polymer having an absolute weight average molecular weight (Mw(Abs)) greater than 1,300,000 g/mol and a Mw(Abs)/Mn(Abs) from 1.3 to 3.0.

The present disclosure provides a process. In an embodiment, the process includes providing a purge stream containing octene monomer. The process includes contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst, and forming an octene polymer having an absolute weight average molecular weight (Mw(Abs)) greater than 1,300,000 g/mol and a Mw(Abs)/Mn(Abs) from 1.3 to 3.0.

The present disclosure provides a process. In an embodiment, the process includes contacting, under polymerization conditions, one or more C.sub.6-C.sub.14 α-olefin monomers with a bis-biphenylphenoxy catalyst. The process includes forming a polymer composed of one or more C.sub.6-C.sub.14 α-olefin monomers, and having an absolute weight average molecular weight (Mw.sub.(abs)) greater than 1,300,000 g/mol and a Mw.sub.(abs)/Mn.sub.(abs) from 1.3 to 3.0.

The present disclosure provides a process. In an embodiment, the process includes contacting, under polymerization conditions, one or more C.sub.6-C.sub.14 α-olefin monomers with a bis-biphenylphenoxy catalyst. The process includes forming a polymer composed of one or more C.sub.6-C.sub.14 α-olefin monomers, and having an absolute weight average molecular weight (Mw.sub.(abs)) greater than 1,300,000 g/mol and a Mw.sub.(abs)/Mn.sub.(abs) from 1.3 to 3.0.