Ethylene-based polymers of this disclosure include an average g′ less than 0.86, where the average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector; and a molecular weight tail quantified by an MWD area metric, A.sub.TAIL, and A.sub.TAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.

Processes for polymerizing polyolefins include contacting ethylene and optionally one or more (C.sub.3-C.sub.12)α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a metal-ligand complex having a structure according to formula (I).

##STR00001##

Processes for polymerizing polyolefins include contacting ethylene and optionally one or more (C.sub.3-C.sub.12)α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a metal-ligand complex having a structure according to formula (I).

##STR00001##

Embodiments of this disclosure include polymers comprising the polymerized product of ethylene, at least one diene comonomer, and optionally at least one C.sub.3 to C.sub.14 comonomer. The polymer comprises tri-functional long-chain branches resulting from the diene that occur at a frequency of at least 0.03 per 1000 carbon atoms of the polymer. The diene has a structure according to formula (I):

Embodiments of this disclosure include polymers comprising the polymerized product of ethylene, at least one diene comonomer, and optionally at least one C.sub.3 to C.sub.14 comonomer. The polymer comprises tri-functional long-chain branches resulting from the diene that occur at a frequency of at least 0.03 per 1000 carbon atoms of the polymer. The diene has a structure according to formula (I):

Embodiments of this disclosure include catalyst systems comprising a metal-ligand complex according to formula (I):

##STR00001##

Embodiments of this disclosure include catalyst systems comprising a metal-ligand complex according to formula (I):

##STR00001##

The present disclosure relates to an olefin polymerization catalyst system for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first olefin polymerization procatalyst, (B) a second olefin polymerization procatalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by procatalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.

Ethylene-based polymers comprise reaction products of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one C.sub.3 to C.sub.14 comonomer under defined polymerization reaction conditions, the ethylene-based polymer having: an M.sub.w/M.sub.w0 greater than 1.20. The M.sub.w0 is the initial weight-average molecular weight of a comparative ethylene-based polymer by gel permeation chromatography. The comparative ethylene-based polymer being a reaction product of polymerizing ethylene monomer and all C.sub.3 to C.sub.14 comonomers present in the ethylene-based polymer, if any, without the at least one polyene comonomer, under the defined polymerization reaction conditions; and a molecular weight tail quantified by an MWD area metric, A.sub.TAIL, and A.sub.TAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.

Ethylene-based polymers comprise reaction products of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one C.sub.3 to C.sub.14 comonomer under defined polymerization reaction conditions, the ethylene-based polymer having: an M.sub.w/M.sub.w0 greater than 1.20. The M.sub.w0 is the initial weight-average molecular weight of a comparative ethylene-based polymer by gel permeation chromatography. The comparative ethylene-based polymer being a reaction product of polymerizing ethylene monomer and all C.sub.3 to C.sub.14 comonomers present in the ethylene-based polymer, if any, without the at least one polyene comonomer, under the defined polymerization reaction conditions; and a molecular weight tail quantified by an MWD area metric, A.sub.TAIL, and A.sub.TAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.