Abstract: A heterogeneous procatalyst includes a preformed heterogeneous procatalyst and a metal-ligand complex. The preformed heterogeneous procatalyst includes a titanium species and a magnesium chloride (MgCl2) support. The metal-ligand complex has a structural formula (L)aM(Y)m(XR2)b, where M is a metal cation; each L is a neutral ligand or (?O); each Y is a halide or (C1-C20)alkyl; each XR2 is an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and R2 is (C1-C20)hydrocarbyl or (C1-C20) heterohydrocarbyl; n is 0, 1, or 2; m is 0-4; and b is 1-6. The metal-ligand complex is overall charge neutral. The heterogeneous procatalyst exhibits improved average molecular weight capability. A catalyst system includes the heterogeneous procatalyst and a cocatalyst. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Abstract: In various embodiments, a bimodal polyethylene may include a high molecular weight component and a low molecular weight component. The bimodal polyethylene may have a density of from 0.933 g/cm3 to 0.960 g/cm3, a melt index (I2) of from 0.3 dg/min to 1.2 dg/min, and a melt flow ratio (MFR21) greater than 70.0. The high molecular weight component may have a density of from 0.917 g/cm3 to 0.929 g/cm3, and a high load melt index (I21) of from 0.85 dg/min to 4.00 dg/min. The bimodal polyethylene may include from 40 wt. % to 60 wt % of the high molecular weight component. Methods for producing the bimodal polyethylene and articles manufactured from the bimodal polyethylene are also provided.

Abstract: A polymeric composition includes a resin including an ethylene-based polymer and a copolymer of ethylene and an alpha olefin comonomer. The resin has a High Mw Comonomer Content of 3.2 wt % or greater based on a total weight of the resin over the weight average molecular weight range of 105 g/mol to 105.5 g/mol as measured by Ethylene GPC. The polymeric composition has a Relevant Comonomer Content of 0.6 wt % or greater. The polymeric composition also includes at least one of (i) a polydimethylsiloxane having a weight average molecular weight of 550,000 g/mol to 650,000 g/mol as measured according to Component GPC and (ii) a polymeric ultraviolet light stabilizer comprising a hindered amine moiety and having a weight average molecular weight from 5,000 g/mol to 20,000 g/mol as measured according to Component GPC.

Abstract: A heterogeneous procatalyst includes a titanium species, a magnesium chloride component, and a chlorinating agent having a structure A(Cl)x(R1)3-x, where A is aluminum or boron, R1 is a (C1-C30) hydrocarbyl, and x is 1, 2, or 3. The magnesium chloride component may be thermally treated at a temperature greater than 100 C for at least 30 minutes before or after introduction of the chlorinating agent and titanium species to the heterogeneous procatalyst. The heterogeneous procatalyst having the thermally treated magnesium chloride exhibits improved average molecular weight capability. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Abstract: According to various embodiments, a microcellular foam is provided, wherein the microcellular foam comprises a polymer blend, the polymer blend comprising: from 70 to 95% by weight low density polyethylene (LDPE); and from 5 to 30% by weight of polydimethylsiloxane grafted LDPE (PDMS-g-LDPE), wherein the microcellular foam has an average cell size of less than 60 ?m.

Abstract: In various embodiments, a bimodal polyethylene may include a high molecular weight component and a low molecular weight component. The bimodal polyethylene may have a density of from 0.933 grams per centimeter (g/cm3) to 0.960 g/cm3, a melt index (I2) of from 0.3 decigrams per minute (dg/min) to 1.2 dg/min, a melt flow ratio (MFR21) greater than 80.0, a molecular weight distribution (Mw/Mn) greater than 10, a reverse comonomer distribution, and a shear thinning index of from 5.0 to 20.0. Methods for producing the bimodal polyethylene, articles manufactured from the bimodal polyethylene are also provided.

Abstract: In various embodiments, a thermoplastic composition may comprise from 0.5 wt. % to 75.0 wt. % of recycled polyethylene comprising a blend of polyethylene recovered from post-consumer material, pre-consumer material, or combinations thereof, and from 25.0 wt. % to 99.5 wt. % of virgin raw polyethylene comprising unimodal polyethylene, bimodal polyethylene, or combinations thereof, wherein at least 90.0 wt. % of the thermoplastic composition is comprised of the post-consumer recycled polyethylene and the virgin raw polyethylene. Manufactured articles made from the thermoplastic composition, such as coated conductors, are also provided.

Abstract: A polymeric composition includes (i) a copolymer of ethylene and an alpha olefin comonomer, the copolymer having a density of 0.945 g/cc to 0.960 g/cc, (ii) an ethylene-based polymer, and (iii) polyethylene glycol. The combination of (i) and (ii) has a High Mw Comonomer Content of 3.2 wt % or greater based on a total weight of the combined (i) and (ii) over the weight average molecular weight range of 105 g/mol to 105.5 g/mol as measured by GPC, wherein 15 wt % or greater of the total weight of the polymeric composition is the combined (i) and (ii) having a molecular weight in the range of 105 g/mol to 105.5 g/mol as measured by GPC, wherein the polymeric composition has a Relevant Comonomer Content of 0.6 wt % or greater and wherein the polymeric composition has a density of 0.945 g/cc or greater as measured according to ASTM D792.

Abstract: A method for preparing a heterogeneous catalyst. The method comprises steps of: (a) combining (i) a support, (ii) an aqueous solution of a noble metal compound and (iii) a C2-C18 thiol comprising at least one hydroxyl or carboxylic acid substituent; to form a wet particle and (b) removing water from the wet particle by drying followed by calcination to produce the catalyst.

Abstract: The catalyst system includes a heterogeneous procatalyst and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula Cp2TiX2, In formula Cp2TiX2, each Cp is a cyclopentadienyl substituted with at least one R1, wherein R1 is (C1-C10)alkyl; and each X is independently a halogen atom.

Abstract: A low density polyethylene (LDPE) having a z-average molecular weight Mz (cony) from 425,000 g/mol to 800,000 g/mol, a melt index I2 less than or equal to 0.20 g/10 min, and a conventional GPC Mw/Mn from 8.0 to 10.6. A LDPE having a GPC-light scattering parameter (LSP) less than 2.00, a ratio of viscosity measured at 0.1 radians/second and 190° C. to a viscosity measured at 100 radians/second and 190° C. that is greater than 50, and a z-average molecular weight Mz (cony) from 425,000 g/mol to 800,000 g/mol.

Abstract: The present invention provides polyethylene-based compositions suitable for packaging applications, films, and articles. In one aspect, a polyethylene-based composition suitable for packaging applications comprises (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of a polyethylene composition comprising: (i) from 25 to 37 percent by weight of a first polyethylene fraction having a density in the range of 0.935 to 0.947 g/cm3 and a melt index (I2) of less than 0.1 g/10 minutes; and (ii) from 63 to 75 percent by weight of a second polyethylene fraction; and (b) 90 to 540 ppm, based on the total weight of the polyethylene-based composition of a calcium salt of 1,2-cyclohexanedicarboxylic acid; wherein the polyethylene composition has less than 0.10 branches per 1,000 carbon atoms when measured using 13C NMR, wherein the density of the polyethylene-based composition N is at least 0.965 g/cm3, and wherein the melt index (I2) of the polyethylene-based composition is 0.

Abstract: A film includes 20.0 weight percent to 69.5 weight percent of a linear low density polyethylene (LLDPE) based polymer. The LLDPE having a high density fraction (HDF) from 3.0% to 8.0%, an I10/I2 ratio from 5.5 to 6.9, and a short chain branching distribution (SCBD) of less than or equal to 8.0° C. The film also includes 0.0 weight percent to 10.0 weight percent low density polyethylene (LDPE) based polymer, and 30.0 weight percent to 70.0 weight percent pore former.

Abstract: A heterogeneous procatalyst includes a preformed heterogeneous procatalyst and a metal-ligand complex. The preformed heterogeneous procatalyst includes a titanium species and a magnesium chloride (MgCl2) support. The metal-ligand complex has a structural formula (L)aM(Y)m(XR2)b, where M is a metal cation; each L is a neutral ligand or (?O); each Y is a halide or (C1-C20)alkyl; each XR2 is an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and R2 is (C1-C20)hydrocarbyl or (C1-C20) heterohydrocarbyl; n is 0, 1, or 2; m is 0-4; and b is 1-6. The metal-ligand complex is overall charge neutral. The heterogeneous procatalyst exhibits improved average molecular weight capability. A catalyst system includes the heterogeneous procatalyst and a cocatalyst. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Abstract: A heterogeneous procatalyst includes a titanium species, a magnesium chloride component, and a chlorinating agent having a structure A(C)x(R1)3-x, where A is aluminum or boron, R1 is a (C1-C30) hydrocarbyl, and x is 1, 2, or 3. The magnesium chloride component may be thermally treated at a temperature greater than 100 C for at least 30 minutes before or after introduction of the chlorinating agent and titanium species to the heterogeneous procatalyst. The heterogeneous procatalyst having the thermally treated magnesium chloride exhibits improved average molecular weight capability. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein said catalyst has an average diameter of at least 200 microns and average concentration of methacrolein is at least 15 wt %.

Abstract: A method for preparing a heterogeneous catalyst. The method comprises steps of: (a) combining (i) a support, (ii) an aqueous solution of a noble metal compound and (iii) a C2-C18 thiol comprising at least one hydroxyl or carboxylic acid substituent; to form a wet particle and (b) removing water from the wet particle by drying followed by calcination to produce the catalyst.

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein said catalyst has an average diameter of at least 200 microns and at least 90 wt % of the noble metal is in the outer 50% of catalyst volume. A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal; wherein said catalyst has an average diameter of at least 200 microns and average concentration of methacrolein is at least 15 wt %.

Abstract: Disclosed herein is a method for doping a substrate, comprising disposing a composition comprising a dopant-containing copolymer and a solvent on a substrate; and annealing the substrate at a temperature of 750 to 1300° C. for 0.1 second to 24 hours to diffuse a dopant into the substrate; wherein the dopant-containing copolymer comprises a non-dopant-containing polymer and a dopant-containing polymer; and where the dopant-containing polymer is a polymer having a covalently or ionically bound dopant atom and is present in a smaller volume fraction than the non-dopant-containing polymer.

Abstract: Disclosed herein is a method for doping a substrate, comprising disposing a coating of a composition comprising a copolymer, a dopant precursor and a solvent on a substrate; where the copolymer is capable of phase segregating and embedding the dopant precursor while in solution; and annealing the substrate at a temperature of 750 to 1300° C. for 0.1 second to 24 hours to diffuse the dopant into the substrate. Disclosed herein too is a semiconductor substrate comprising embedded dopant domains of diameter 3 to 30 nanometers; where the domains comprise Group 13 or Group 15 atoms, wherein the embedded spherical domains are located within 30 nanometers of the substrate surface.