Abstract: Polymer compositions and uses thereof are described. A polymeric composition can include a polyolefin polymer and a nucleating agent having an average particle size of less than 2 micrometers.

Abstract: A recycled polypropylene formulation comprising virgin polypropylene in an amount ranging from greater than or equal to about 0 weight percent (wt %) to less than or equal to about 99 wt %, and recycled polypropylene in an amount ranging from greater than or equal to 1 wt % to less than or equal to about 100 wt %, based on a total weight of the virgin polypropylene and the recycled polypropylene; and a mineral filler.

Abstract: A polypropylene composition containing a polypropylene base resin, and a polyolefin wax. The polypropylene composition may comprise the polyolefin wax in an amount ranging from greater than or equal to about 1 weight percent (wt %) to less than or equal to about 20 wt %, based on a total weight of the polypropylene composition.

Abstract: Thin polymer sheets and used thereof are described. A polymer sheet can include greater than 90 wt. % of a single-site catalyzed polyolefin (PO) and have a thickness of at least 0.0254 cm. The sheet can be used to produce molded articles.

Abstract: A composition including a first polypropylene having at least 90 wt. % propylene by weight of the first polypropylene, an alpha nucleation inhibitor, and a beta nucleation additive is provided. Also provided is a method of preparing a foamable polypropylene composition. The method includes the steps: a) compounding a first polypropylene including at least 90 wt. % propylene by weight of the first polypropylene with an alpha nucleation inhibitor to form a polypropylene blend; b) compounding the polypropylene blend with a blowing agent to form a pre-annealed polypropylene composition; and c) annealing the pre-annealed polypropylene composition at an annealing temperature Ta for an annealing time ta to form the foamable polypropylene composition. The foamable polypropylene composition has a first melting peak T1 and a second melting peak T2 as measured by differential scanning calorimetry at a heating rate of 20° C. per minute.

Abstract: A polypropylene random copolymer comprising (i) from about 0.2 wt. % to about 1.5 wt. % ethylene; and (ii) a nucleator selected from the group consisting of sodium benzoate, derivatives of dibenzylidene sorbitol (DBS), nonitol, trisamide-containing compounds, organophosphate salts and combinations thereof, wherein the copolymer has a melt flow rate of from about 0.5 dg/min. to about 5.0 dg/min. and a xylene solubles content of from about 1.0 wt. % to about 4.0 wt. %.

Abstract: A method of preparing a vis-broken recycled polypropylene comprising contacting (i) a recycled polypropylene and (ii) an optional virgin polypropylene with a rheology modifier to form a mixture; and subjecting the mixture to reactive extrusion.

Abstract: A method of preparing a film comprising contacting a recycled polypropylene with a cavitating agent and an optional virgin polypropylene to form a mixture; extruding the mixture to form an extrudate; and biaxially orientating the extrudate to form a biaxially oriented film.

Abstract: A method of making a film by coextruding a multi-layer structure comprising at least one skin layer comprising a metallocene-based polypropylene random copolymer. A coextruded multi-layer film comprising at least one skin layer comprising a metallocene-based polypropylene random copolymer, and a flexible package compromising such a coextruded multi-layer film are also provided.

Abstract: A polymer blend comprising (i) a primary polypropylene; and (ii) a secondary polypropylene, wherein the primary polypropylene comprises a Ziegler Natta polypropylene, a recycled polypropylene or combination thereof, and wherein the secondary polypropylene comprises a metallocene-catalyzed polypropylene.

Abstract: Disclosed is a polymeric composition that can include at least 95 wt. % of a polypropylene copolymer, and 50 ppm to 2000 ppm of an aryl amide containing clarifying agent, a phosphate ester salt containing clarifying agent, or a combination thereof. The polymeric composition can have a haze value of A after being extruded once and a haze value of B after being extruded 2 times, wherein the ratio of A to B is 1 to 1.35, wherein A is less than 25%, and wherein A and B are determined in accordance with ASTM D1003, at a thickness of about 40 mil.

Abstract: Polymer blends, methods of making, and methods of using the polymer blends are described. A polymer blend can include a polyethylene (PE) polymer and a controlled rheology polypropylene (CRPP) polymer having a PE polymer to CRPP polymer (PE:CRPP) weight ratio of greater than 1:1.

Abstract: Processing parameters of polypropylene and/or polyethylene are adjusted by combining them with a non-fluorinated process aid. The process aid is an oleochemical derivative and/or a wax having a viscosity of from 10 cP to 100 cP. The wax is a branched ethylene-propylene copolymer. The processing parameter, e.g., pressure at the die, or volumetric output is adjusted for the polypropylene and/or polyethylene compared to the polypropylene and/or polyethylene without the non-fluorinated process aid at the same processing conditions. The mechanical properties of an extruded polymeric article including the non-fluorinated process aid are the same or are improved compared to the same composition without the non-fluorinated polymer processing aid or one that includes a fluorinated processing aid.

Abstract: A composition including a first polypropylene having at least 90 wt. % propylene by weight of the first polypropylene, an alpha nucleation inhibitor, and a beta nucleation additive is provided. Also provided is a method of preparing a foamable polypropylene composition. The method includes the steps: a) compounding a first polypropylene including at least 90 wt. % propylene by weight of the first polypropylene with an alpha nucleation inhibitor to form a polypropylene blend; b) compounding the polypropylene blend with a blowing agent to form a pre-annealed polypropylene composition; and c) annealing the pre-annealed polypropylene composition at an annealing temperature Ta for an annealing time ta to form the foamable polypropylene composition. The foamable polypropylene composition has a first melting peak T1 and a second melting peak T2 as measured by differential scanning calorimetry at a heating rate of 20° C. per minute.

Abstract: A method of adjusting a processing parameter of a polymer is provided. The method has the steps a) and b). Step a) is combining polymer i) which is polypropylene and/or polyethylene with a process aid ii) to provide a polymer composition. Polymer i) has a peak molecular weight Mp and a polydispersity index PDI of 7 or higher. Step b) is processing the polymer composition at a processing condition. The processing parameter is adjusted at the processing condition for the polymer composition compared to a comparative polymer composition A); and a comparative polymer composition B). Comparative polymer composition A) lacks the process aid ii) but is otherwise identical to the polymer composition. Comparative polymer composition B) includes a comparative polymer having the same composition and Mp as polymer i) and a PDI less than polymer i) instead of the polymer i), but is otherwise identical to the polymer composition.

Abstract: A styrenic polymer characterized by a z-average molecular weight of from about 339 kDa to about 520 kDa; a molecular weight distribution of from about 2.5 to about 5.0; a melt strength of from about 0.010 N to about 0.018 N and a melt A method of preparing a styrenic polymer comprising contacting a styrenic monomer, an optional comonomer and an optional initiator to a plurality of temperature environments wherein the difference in temperature between the first environment and the last environment is greater than about 30° C. to form the styrenic polymer; and recovering the styrenic polymer.

Abstract: A high impact polystyrene reactor system includes a first continuously stirred tank reactor. The first continuously stirred tank reactor includes an inlet configured to receive (i) at least one vinyl aromatic monomer, (ii) an elastomer, and (iii) a free radical initiator; and an outlet configured to convey a first reactor effluent. In addition, the high impact polystyrene reactor system includes a second continuously stirred tank reactor. The second continuously stirred tank reactor includes an inlet in fluid communication with the first continuously stirred tank reactor outlet and configured to receive (i) a portion of the first reactor effluent from the first continuously stirred tank reactor, (ii) at least one vinyl aromatic monomer, (iii) an elastomer, and (iv) a free radical initiator; and an outlet configured to convey a portion of a second reactor effluent comprising high impact polystyrene.

Abstract: Disclosed is a polymeric composition containing at least 95 wt. % of a polypropylene copolymer; and 50 ppm to 2000 ppm of an aryl amide containing clarifying agent or a phosphate ester salt containing clarifying agent or a combination thereof, wherein the polymeric composition has a haze value of A after being extruded once and a haze value of B after being extruded 5 times, wherein the ratio of A to B is 1 to 1.35 and A is less than 25%, and wherein A and B are determined in accordance with ASTM D1003, at a thickness of about 40 mil, methods of making the polymeric composition and articles containing the polymeric composition.

Abstract: A process for producing high impact polystyrene comprising introducing to a reactor a partially-polymerized mixture comprising at least one vinyl aromatic monomer, an elastomer and reacted vinyl aromatic monomer wherein the partially-polymerized mixture has not undergone phase inversion; polymerizing the partially-polymerized mixture in the reactor to the phase inversion point to form a phase-inverted mixture; recovering a portion of the phase-inverted mixture from the reactor wherein the phase-inverted mixture comprises high impact polystyrene; and introducing another portion of the phase-inverted mixture to another reactor.

Abstract: A process forming a high MFR polypropylene includes providing a reactor powder polypropylene, the reactor powder polypropylene having a melt flow rate of less than 100 dg/min. The process also includes mixing the reactor powder polypropylene with a free-radical initiator to form a powder/initiator mixture and subjecting the powder/initiator mixture to post-reactor forming. The present disclosure further provides for a vis-broken polypropylene and a polymer article.