A method of forming a thermoformed article may include melt extruding polyethylene to form an extruded sheet. The rheological breadth parameter of the polyethylene may change by no more than about 5% after extrusion relative to the rheological breadth parameter of the polyethylene prior to extrusion. The extruded sheet may be thermoformed within a mold to form the thermoformed article. During thermoforming, the extruded sheet may be subjected to solid-state stretching in one or more directions. The thermoformed article may be retrieved from the mold. The polyethylene may have a rheological breadth parameter of from 0.20 to 0.40, a multimodal molecular weight distribution, a polydispersity (Mw/Mn) of from 5 to 18, a density ranging from 0.940 to 0.970 g/cc, may exhibit tensile strain-hardening, or combinations thereof.

A thermoplastic elastomer composition including: a crystalline olefin resin (A) having a melting point of 100 C. or more; an olefin resin (B) satisfying requirements (B-1) to (B-3); and an ethylene/-olefin copolymer (C), the weight ratio of (A)/((B)+(C)) is from 70/30 to 30/70, and the weight ratio of (B)/(C) is from 100/0 to 1/99: (B-1) the resin (B) has a main chain of an ethylene copolymer and a side chain of an ethylene polymer or a propylene polymer, the ethylene copolymer includes repeating units derived from ethylene and repeating units derived from at least one -olefin having 3 to 20 carbon atoms, and the repeating units derived from the -olefin contained within the range of 10 to 50 mol % to the total repeating units in the main chain; (B-2) the melting point measured by DSC rom 60 C. to 170 C.; and (B-3) Tg measured by DSC from 80 C. to 30 C.

A thermoplastic elastomer composition including: a crystalline olefin resin (A) having a melting point of 100 C. or more; an olefin resin (B) satisfying requirements (B-1) to (B-3); and an ethylene/-olefin copolymer (C), the weight ratio of (A)/((B)+(C)) is from 70/30 to 30/70, and the weight ratio of (B)/(C) is from 100/0 to 1/99: (B-1) the resin (B) has a main chain of an ethylene copolymer and a side chain of an ethylene polymer or a propylene polymer, the ethylene copolymer includes repeating units derived from ethylene and repeating units derived from at least one -olefin having 3 to 20 carbon atoms, and the repeating units derived from the -olefin contained within the range of 10 to 50 mol % to the total repeating units in the main chain; (B-2) the melting point measured by DSC rom 60 C. to 170 C.; and (B-3) Tg measured by DSC from 80 C. to 30 C.

Solid adducts comprising MgCl.sub.2, ethanol and water characterized in that the amount of ethanol ranges from 50% to less than 57% by weight, the amount of water is ranges from 0.5 to 5% by weight, the ethanol/water weight ratio is lower than 60 and the porosity determined with Hg method due to pores with radius up to 1 m and expressed in cm.sup.3/g, is lower than 0.2.

Solid adducts comprising MgCl.sub.2, ethanol and water characterized in that the amount of ethanol ranges from 50% to less than 57% by weight, the amount of water is ranges from 0.5 to 5% by weight, the ethanol/water weight ratio is lower than 60 and the porosity determined with Hg method due to pores with radius up to 1 m and expressed in cm.sup.3/g, is lower than 0.2.

This invention relates to a thermoplastic polyolefin composition with (a) a polypropylene having a melting point of greater than 130 C. and a melt flow rate from 10 to 80 g/10 min; (b) an ethylene-propylene copolymer with 40 wt % to 80 wt % ethylene derived units and a Mooney Viscosity (1+4, 125 C.) of greater than 20 Mooney units, a Mw/Mn of from 1.8 to 4.0, and a weight average molecular weight of 50,000 to 300,000 g/mole; and (c) a propylene-based elastomer having 5 wt % to 25 wt % ethylene derived units and having a melting point of less than 110 C. and a Mw/Mn from 2.0 to 4.0; wherein the room temperature notch impact of the thermoplastic polyolefin composition is at least four times greater than the room temperature notch impact of a composition without the propylene-based elastomer.

This invention relates to a thermoplastic polyolefin composition with (a) a polypropylene having a melting point of greater than 130 C. and a melt flow rate from 10 to 80 g/10 min; (b) an ethylene-propylene copolymer with 40 wt % to 80 wt % ethylene derived units and a Mooney Viscosity (1+4, 125 C.) of greater than 20 Mooney units, a Mw/Mn of from 1.8 to 4.0, and a weight average molecular weight of 50,000 to 300,000 g/mole; and (c) a propylene-based elastomer having 5 wt % to 25 wt % ethylene derived units and having a melting point of less than 110 C. and a Mw/Mn from 2.0 to 4.0; wherein the room temperature notch impact of the thermoplastic polyolefin composition is at least four times greater than the room temperature notch impact of a composition without the propylene-based elastomer.

An ultra-high molecular weight ethylene-based copolymer powder comprising: an ethylene unit and an -olefin unit having 3 or more and 8 or less carbon atoms as structural units, wherein the ultra-high molecular weight ethylene-based copolymer powder has a viscosity-average molecular weight of 100,000 or more and 10,000,000 or less, a content of the -olefin unit is 0.01 mol % or more and 0.10 mol % or less based on a total amount of the ethylene unit and the -olefin unit, and in measurement with a differential scanning calorimeter under following conditions, an isothermal crystallization time is determined as a time from reaching 126 C. of Step A3 as a starting point (0 min) to giving an exothermic peak top due to crystallization and the isothermal crystallization time is 5 minutes or more. (Conditions for measurement of isothermal crystallization time) Step A1: holding at 50 C. for 1 minute and then an increase up to 180 C. at a temperature rise rate of 10 C./min, Step A2: holding at 180 C. for 30 minutes and then a decrease down to 126 C. at a temperature drop rate of 80 C./min, and Step A3: holding at 126 C.

An ultra-high molecular weight ethylene-based copolymer powder comprising: an ethylene unit and an -olefin unit having 3 or more and 8 or less carbon atoms as structural units, wherein the ultra-high molecular weight ethylene-based copolymer powder has a viscosity-average molecular weight of 100,000 or more and 10,000,000 or less, a content of the -olefin unit is 0.01 mol % or more and 0.10 mol % or less based on a total amount of the ethylene unit and the -olefin unit, and in measurement with a differential scanning calorimeter under following conditions, an isothermal crystallization time is determined as a time from reaching 126 C. of Step A3 as a starting point (0 min) to giving an exothermic peak top due to crystallization and the isothermal crystallization time is 5 minutes or more. (Conditions for measurement of isothermal crystallization time) Step A1: holding at 50 C. for 1 minute and then an increase up to 180 C. at a temperature rise rate of 10 C./min, Step A2: holding at 180 C. for 30 minutes and then a decrease down to 126 C. at a temperature drop rate of 80 C./min, and Step A3: holding at 126 C.

A process may include contacting ethylene monomer with Ziegler-Natta catalyst to form polyethylene. The Ziegler-Natta catalyst may be formed by contacting an alkyl magnesium compound with an alcohol and a metal reagent to form a blend, and contacting the blend with a first agent to form a solution of reaction product A. The solution of reaction product A may be contacted with a second agent to form a solid reaction product B, and the solid reaction product B may be contacted with a third agent to form a solid reaction product C. The solid reaction product C may be contacted with a fourth agent to form a solid reaction product D, and the solid reaction product D may be contacted with a fifth agent to form a catalyst component.