Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: The invention relates to a free-radical initiator composition for polyolefin modification comprising a peroxide-modified inorganic solid particle prepared from: i) a liquid or solution of hydrogen peroxide, and ii) one or more inorganic solid particles, wherein the inorganic solid particles have affinity to the hydrogen peroxide through hydrogen bonding. The invention also relates to a method for preparing a peroxide-modified inorganic composition, comprising mixing a liquid or solution of hydrogen peroxide and one or more inorganic solid particles to form a suspension or gel, and optionally, filtering the suspension or gel and drying the filtered materials to form a solid, peroxide-modified inorganic composition.

Abstract: The invention relates to a process for modifying an olefin polymer composition comprising melt mixing an olefin polymer composition with a free-radical initiator composition comprising a peroxide-modified inorganic composition prepared from: i) a liquid or an aqueous hydrogen peroxide, and ii) one or more inorganic solid particles, wherein the inorganic solid particles have affinity to the hydrogen peroxide through hydrogen bonding. The invention also relates to a modified olefin polymer composition prepared by the process and various articles formed from the modified olefin polymer composition.

Abstract: This invention relates to a process for modifying an olefin polymer composition, comprising melt mixing an olefin polymer composition with a free-radical initiator composition comprising a metal peroxide powder, wherein the free-radical initiator composition initiates a free-radical reaction of the olefin polymer composition to produce a modified olefin polymer composition. The invention also relates to a modified olefin polymer composition prepared by the process and various articles formed from the modified olefin polymer composition.

Abstract: A composition comprising polypropylene having a high melt strength suitable for an injection stretch blow molding (ISBM) process is provided. Such a composition includes a polypropylene (PP) copolymer having a branched structure. The PP copolymer is a random copolymer derived from propylene and at least one comonomer selected from ethylene, any C4-C8 alpha-olefin, or any combinations thereof. The composition has a melt flow index in a range of from 8 g/10 minutes to 30 g/10 minutes. A resulting fabricated article, a method of making the composition, and a method of using the composition are also provided.

Abstract: Propylene-based polymer resins and related compositions and processes are disclosed. The propylene polymer resins have high isotacticity and moderately high xylene soluble content. The polymer resins provide extruded sheets suitable for thermo forming that exhibit both sag resistance and ease of draw.

Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: A polymeric composition may include a thermoplastic polymer including: at least one monomer selected from the group consisting of vinyl esters, C2-C12 olefins, and combinations thereof; and a dynamic crosslinking group; and a crosslinking agent to dynamically crosslink the thermoplastic polymer by ionic bonds or metal-ligand interaction.

Abstract: A polymeric composition may include a thermoplastic polymer including: at least one monomer selected from the group consisting of vinyl esters, C2-C12 olefins, and combinations thereof; and a dynamic crosslinking group; and a dynamic crosslinking system to dynamically crosslink the thermoplastic polymer.

Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: A method may include processing a crosslinked polymer and a catalyst to form a vitrimer during a melt processing operation, the crosslinked polymer comprising at least one monomer selected from a vinyl ester, a C2-C12 olefin, and combinations thereof. A method may include mixing a crosslinked polymer, a catalyst, and a non-crosslinked polymer at a temperature higher than a processing temperature of the non-crosslinked polymer to form a polymer composition; wherein each of the crosslinked polymer and the non-crosslinked polymer comprise at least one monomer selected from a vinyl ester, a C2-C12 olefin, and combinations thereof, and wherein the crosslinked polymer is present in an amount that is at least 15 wt %, relative to the combined total of crosslinked polymer and non-crosslinked polymer.

Abstract: A method for producing a low viscosity polypropylene composition may include melting a polypropylene-based composition; reducing a viscosity of the polypropylene-based composition; and optionally, repeating the melting and the reducing steps to form a low melt viscosity polypropylene-based composition; wherein the melting and viscosity decreasing steps are performed in the presence of at least one free radical generator and at least one pro-degradant stearate.

Abstract: A method for producing a low viscosity polyethylene-based composition comprising melting a polyethylene-based composition; decreasing a viscosity of the polyethylene-based composition; and optionally, repeating the melting and the viscosity decreasing steps to form a low viscosity polyethylene-based composition; wherein the melting and viscosity decreasing steps are performed in a continuous process at temperature that is equal to or greater than 350° C., residence time of less than 2 min and the polyethylene-based composition is in the presence of at least one free radical generator.

Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: A foamable composition includes a semi-crystalline polyolefin having a crystallinity of at least 50% and a poly(sulfonyl azide) of at least 500 ppm based on the total weight of the foamable composition. The foamable composition has a melt strength of at least 20 cN, a melt drawability of at least 100 mm/s, flexural modulus is greater than about 240,000 psi. Such a composition can be used to make a low density foam having a density in the range from 0.005 g/cm3 to 0.6 g/cm3. A resulting foam or a fabricated article, the methods of the composition and the foam are also provided.

Abstract: A composition comprising polypropylene having a high melt strength suitable for an injection stretch blow molding (ISBM) process is provided. Such a composition includes a polypropylene (PP) copolymer having a branched structure. The PP copolymer is a random copolymer derived from propylene and at least one comonomer selected from ethylene, any C4-C8 alpha-olefin, or any combinations thereof. The composition has a melt flow index in a range of from 8 g/10 minutes to 30 g/10 minutes. A resulting fabricated article, a method of making the composition, and a method of using the composition are also provided.

Abstract: A propylene-based polymer composition is characterized by a melt strength at 190° C. of at least 20 cN, a melt drawability at 190° C. of at least 100 mm/s, and a flexural modulus at room temperature of at least 240,000 psi. The propylene-based polymer composition includes a propylene-based polymer resin having a crystallinity of at least 50% coupled with a poly(sulfonyl azide).

Abstract: A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.

Abstract: A propylene-based polymer composition is characterized by a melt strength at 190° C. of at least 20 cN, a melt drawability at 190° C. of at least 100 mm/s, and a flexural modulus at room temperature of at least 240,000 psi. The propylene-based polymer composition includes a propylene-based polymer resin having a crystallinity of at least 50% coupled with a poly(sulfonyl azide).