The invention relates to a family of Pd(II)-based catalysts of general formula (I) reproduced below for use in the production of olefin/polar vinyl monomer copolymers and olefin homopolymers. The invention also refers to ligands that are intermediates in the synthesis of the catalysts, to the process for the synthesis of homo- and copolymers using these catalysts, and to the homo- and copolymers thus obtained.

The invention relates to a family of Pd(II)-based catalysts of general formula (I) reproduced below for use in the production of olefin/polar vinyl monomer copolymers and olefin homopolymers. The invention also refers to ligands that are intermediates in the synthesis of the catalysts, to the process for the synthesis of homo- and copolymers using these catalysts, and to the homo- and copolymers thus obtained.

The present disclosure provides an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The ethylene-based polymer composition includes ethylene monomer and a mixture of hydrocarbon-based molecules, each hydrocarbon-based molecule comprising three or more terminal alkene groups. The ethylene-based polymer has a melt index (MI) from 0.1 to 1.0 g/10 min.

The present disclosure provides an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The ethylene-based polymer composition includes ethylene monomer and a mixture of hydrocarbon-based molecules, each hydrocarbon-based molecule comprising three or more terminal alkene groups. The ethylene-based polymer has a melt index (MI) from 0.1 to 1.0 g/10 min.

The present disclosure provides an ethylene-based polymer composition formed by high pressure (greater or equal to 100 MPa) free radical polymerization. The ethylene-based polymer composition includes ethylene monomer and a mixture of hydrocarbon-based molecules, each hydrocarbon-based molecule comprising three or more terminal alkene groups. The ethylene-based polymer has a melt index (MI) from 0.1 to 1.0 g/10 min.

A polyethylene powder satisfying (Requirements 1 to 3):

(Requirement 1): viscosity-average molecular weight (Mv) is 200,000 or more and 3,000,000 or less
(Requirement 2): complex viscosity |η*|.sub.m obtained by measurement under predetermined <Conditions for Measurement of Slurry Viscoelasticity>satisfies the following formula (1):
590.0×(Mv×10.sup.−4).sup.1.18≥|η*|.sub.m≥13.3×(Mv×10.sup.−4).sup.1.18 (1)
(Requirement 3): a value of any peak when d(log|η*|)/dT is plotted against temperature is 1.0 or more and 3.0 or less.

A polyethylene powder satisfying (Requirements 1 to 3):

(Requirement 1): viscosity-average molecular weight (Mv) is 200,000 or more and 3,000,000 or less
(Requirement 2): complex viscosity |η*|.sub.m obtained by measurement under predetermined <Conditions for Measurement of Slurry Viscoelasticity>satisfies the following formula (1):
590.0×(Mv×10.sup.−4).sup.1.18≥|η*|.sub.m≥13.3×(Mv×10.sup.−4).sup.1.18 (1)
(Requirement 3): a value of any peak when d(log|η*|)/dT is plotted against temperature is 1.0 or more and 3.0 or less.

A polyethylene powder satisfying (Requirements 1 to 3):

(Requirement 1): viscosity-average molecular weight (Mv) is 200,000 or more and 3,000,000 or less
(Requirement 2): complex viscosity |η*|.sub.m obtained by measurement under predetermined <Conditions for Measurement of Slurry Viscoelasticity>satisfies the following formula (1):
590.0×(Mv×10.sup.−4).sup.1.18≥|η*|.sub.m≥13.3×(Mv×10.sup.−4).sup.1.18 (1)
(Requirement 3): a value of any peak when d(log|η*|)/dT is plotted against temperature is 1.0 or more and 3.0 or less.

The invention relates to an ethylene polymer comprising a low molecular weight component and a high molecular weight component, wherein—the ethylene polymer has a density of 955 to 977 kg/m.sup.3 and a viscosity value η100 of at most 1500 Pa.Math.s and a strain hardening as determined according to ISO18488 of at least 25 MPa, for example 30 to 40 MPa,—the amount of the low molecular weight component with respect to the total ethylene polymer is at least 60 wt %,—the low molecular weight component has a Mw of 10,000 to 50,000 g/mol, a ratio of Mw/Mn of 2.5 to 4.5 and a density of 965 to 985 kg/m.sup.3 and—the high molecular weight component has a Mw of 100,000 to 1,000,000, a ratio of Mw/Mn of 2.5 to 4.0 and a density of 920 to 950 kg/m.sup.3.

The invention relates to an ethylene polymer comprising a low molecular weight component and a high molecular weight component, wherein—the ethylene polymer has a density of 955 to 977 kg/m.sup.3 and a viscosity value η100 of at most 1500 Pa.Math.s and a strain hardening as determined according to ISO18488 of at least 25 MPa, for example 30 to 40 MPa,—the amount of the low molecular weight component with respect to the total ethylene polymer is at least 60 wt %,—the low molecular weight component has a Mw of 10,000 to 50,000 g/mol, a ratio of Mw/Mn of 2.5 to 4.5 and a density of 965 to 985 kg/m.sup.3 and—the high molecular weight component has a Mw of 100,000 to 1,000,000, a ratio of Mw/Mn of 2.5 to 4.0 and a density of 920 to 950 kg/m.sup.3.