Abstract: A thermoplastic composition includes: a first branched polycarbonate copolymer end-capped with 4-hydroxybenzonitrile (4-HBN) having a molecular weight M1; and a second branched polycarbonate copolymer end-capped with 4-HBN having a molecular weight M2. M1 is less than M2. Methods for determining entanglement molecular weight (Me) of a polycarbonate copolymer include: preparing a sample of a branched polycarbonate copolymer including a 1,1,1-tris-hydroxy-phenylethane (THPE) branching agent and that is end-capped with 4-HBN; determining phase angle (?) versus complex modulus (G*) of the sample using a small amplitude oscillatory rheology process at a specified temperature; determining a minima in the ? of the sample; determining a plateau modulus (GN) of the sample from the determined minima of ?; and calculating the Me of the sample from the GN.

Abstract: A thermoplastic composition includes from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA), and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. A method of making a thermoplastic composition includes: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a mixture; and melt processing the mixture to polymerize it and form the thermoplastic composition.

Abstract: A nano-composite includes a thermoplastic copolymer includes a polycarbonate copolymer including repeating siloxane units and a plurality of quantum dots. A method of making a polymer film includes forming a masterbatch composition by combining (1) a first thermoplastic copolymer including a polycarbonate copolymer including repeating siloxane units and (2) a plurality of quantum dots; combining the masterbatch composition with a second thermoplastic polymer to form a mixture; and forming the polymer film from the mixture. The polycarbonate copolymer has a siloxane content of from 15 wt % to 65 wt %.

Abstract: A poly(carbonate-siloxane) composition comprising: a poly(carbonate-siloxane) copolymer comprising carbonate units and siloxane units, wherein a siloxane content is greater than 25 wt % to less than 70 wt %, based on the total weight of the poly (carbonate-siloxane) copolymer and wherein the weight average molecular weight of the poly (carbonate-siloxane) copolymer is greater than 30,000 g/mol, as measured by gel permeation chromatography using a crosslinked styrene-divinyl benzene column, using polystyrene standards and calibrated for polycarbonate; a homopolycarbonate comprising a bisphenol A homopolycarbonate; a colorant composition comprising an organic colorant, an inorganic pigment, or a combination thereof, wherein the colorant composition optionally comprises titanium dioxide in an amount of 0.

Abstract: A thermoplastic composition includes: a thermoplastic polymer including from about 30 wt % to about 90 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 20 wt % to about 60 wt %; and a plurality of photoluminescent materials including quantum dots.

Abstract: A thermoplastic composition includes from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA), and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. A method of making a thermoplastic composition includes: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a mixture; and melt processing the mixture to polymerize it and form the thermoplastic composition.

Abstract: A thermoplastic composition comprising: a polymer material; and a passivated inorganic chromophore comprising an inorganic chromophore and a passivation layer, wherein the inorganic chromophore has the formula: AM1-xM?xM?yO3+y, wherein A, M, M?, M?, x, and y are as provided herein, and wherein the passivation layer is derived from a passivation material comprising a polysiloxane having at least one functional group that is hydride, hydroxy, alkoxy, aryloxy, epoxy, carboxy, amino, or a combination thereof.

Abstract: Thermoplastic compositions include: (a) from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA); and (b) from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. Methods for making a molded article, include: (a) combining from about 30 wt % to about 95 wt % PMMA and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a blend; (b) melt processing and pelletizing the blend; and (c) injection molding the article from the melt processed and pelletized blend.

Abstract: A nano-composite includes a thermoplastic copolymer includes a polycarbonate copolymer including repeating siloxane units and a plurality of quantum dots. A method of making a polymer film includes forming a masterbatch composition by combining (1) a first thermoplastic copolymer including a polycarbonate copolymer including repeating siloxane units and (2) a plurality of quantum dots; combining the masterbatch composition with a second thermoplastic polymer to form a mixture; and forming the polymer film from the mixture. The polycarbonate copolymer has a siloxane content of from 15 wt % to 65 wt %.

Abstract: Thermoplastic compositions include: (a) from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA); and (b) from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. Methods for making a molded article, include: (a) combining from about 30 wt % to about 95 wt % PMMA and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a blend; (b) melt processing and pelletizing the blend; and (c) injection molding the article from the melt processed and pelletized blend.

Abstract: A polycarbonate copolymer contains aromatic carbonate units; optionally siloxane units; and resorcinol arylate ester units. The resorcinol arylate ester units of the polycarbonate copolymer are derived from a resorcinol composition having a hydroquinone content of 50 to 1200 parts per million, a catechol content of 5 to 29 parts per million, and a phenol content of 0 to 2400, each as determined by high performance liquid chromatography, and further comprising an acid stabilizer.

Abstract: A multi-layer film may comprise a first quantum dot layer comprising a first polymer matrix and a plurality of first quantum dots disposed therein. A second quantum dot layer may be disposed adjacent the first quantum dot layer and may comprise a second polymer matrix and a plurality of second quantum dots disposed therein. The plurality of first quantum dots may be spaced from each other within the first polymer matrix to define gaps there between. The plurality of first quantum dots may emit a first secondary light upon excitation by light produced from a light source. At least a portion of the plurality of second quantum dots may be positioned to align with the gaps defined in the first polymer matrix along an axis that is orthogonal to the first quantum dot layer and the second quantum dot layer.

Abstract: A polycarbonate copolymer comprises aromatic carbonate units; optionally siloxane units; and resorcinol arylate ester units derived from a resorcinol composition having a hydroquinone content of 50 to 1200 parts per million, a catechol content of 5 to 29 parts per million, and a phenol content of 0 to 2400, each as determined by high performance liquid chromatography, and further comprising an acid stabilizer.

Abstract: Thermoplastic compositions include: from about 62 wt % to about 99 wt % poly(methyl methacrylate) (PMMA) or copolymers thereof; and from about 1 wt % to about 38 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. The compositions are scratch resistant. Scratch resistance may be determined as comprising a scratch depth of less than 20 micron (?m) as measured in accordance with the Erichsen scratch hardness test at a force of 4 Newton (N). Articles including the thermoplastic composition are also described.

Abstract: Thermoplastic compositions include: from about 62 wt % to about 99 wt % poly(methyl methacrylate) (PMMA) or copolymers thereof; and from about 1 wt % to about 38 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. The compositions are scratch resistant. Scratch resistance may be determined as comprising a scratch depth of less than 20 micron (?m) as measured in accordance with the Erichsen scratch hardness test at a force of 4 Newton (N). Articles including the thermoplastic composition are also described.

Abstract: Disclosed is a quantum dot composition comprising: a polycarbonate resin, a polycarbonate copolymer resin, or a combination thereof; a quantum dot concentrate including a plurality of nanoparticle quantum dots and an acrylic polymer, a methacrylic polymer, or a combination thereof; and a compatibilizer for promoting dispersion of the nanoparticle quantum dots in the quantum dot composition. The compatibilizer includes a transesterification catalyst, a physical compatibilizer, a plurality of semiconductor nanopartides passivated with a metal oxide, or a combination thereof. Further disclosed is a method for making a quantum dot composition, the method including: forming a quantum dot concentrate by combining a plurality of nanoparticle quantum dots with an acrylic polymer, a methacrylic polymer or a combination thereof; and combining the quantum dot concentrate with a compatibilizer and a polycarbonate resin, a polycarbonate copolymer resin, or a combination thereof.

Abstract: A thermoplastic composition comprising: a polymer material; and a passivated inorganic chromophore comprising an inorganic chromophore and a passivation layer, wherein the inorganic chromophore has the formula: AM1-xM?xM?yO3+y, wherein A, M, M?, M?, x, and y are as provided herein, and wherein the passivation layer is derived from a passivation material comprising a polysiloxane having at least one functional group that is hydride, hydroxy, alkoxy, aryloxy, epoxy, carboxy, amino, or a combination thereof.

Abstract: A thermoplastic composition includes: from about 5 wt % to about 70 wt % poly(methyl methacrylate) (PMMA); from about 15 wt % to about 50 wt % of a first poly(carbonate-siloxane) copolymer having a siloxane content of from about 35 wt % to about 45 wt %; and from about 10 wt % to about 45 wt % of a second poly(carbonate-siloxane) copolymer. The second poly(carbonate-siloxane) copolymer has a siloxane content of from about 15 wt % to about 25 wt % or from about 4 wt % to about 8 wt %.

Abstract: A thermoplastic composition includes: from about 5 wt % to about 70 wt % poly(methyl methacrylate) (PMMA); from about 15 wt % to about 50 wt % of a first poly(carbonate-siloxane) copolymer having a siloxane content of from about 35 wt % to about 45 wt %; and from about 10 wt % to about 45 wt % of a second poly(carbonate-siloxane) copolymer. The second poly(carbonate-siloxane) copolymer has a siloxane content of from about 15 wt % to about 25 wt % or from about 4 wt % to about 8 wt %.

Abstract: Process for manufacturing a densified polymer powder comprising compressing a polymer feed that has a bulk density of less than or equal to 240 kg/m in a roll compactor comprising at least two compaction rolls to obtain a densified polymer material, wherein a gap between the two rolls is 0.5 to 10 mm, wherein the compaction rolls operate at a speed of 3 to 30 rpm, wherein an applied pressure of the roll compactor is 0.5 to 5 MPa, and milling the densified polymer material to obtain a densified polymer powder, wherein a bulk density of the densified polymer powder is greater than or equal to 250 kg/m3.