Abstract: Provided are amorphous and at least partially crystalline polyetherimide compositions having a comparatively narrow particle size distribution and are particularly suited for additive manufacturing processes. The compositions comprise a population of polyetherimide particulates are characterized as having a zero-shear viscosity sufficiently low so as to achieve a coalescence of at least 0.5, and preferably of about 1.0, as characterized by the Frenkel model at a temperature less than 450° C.

Abstract: A composition includes specific amounts of a poly (phenylene ether), a hydrogenated block copolymer of an alkenyl aromatic monomer and a conjugated diene, a polypropylene, a polybutene, a flame retardant, and an ultraviolet absorbing agent comprising a bis(benzotriazole) compound. The composition is particularly useful for forming the jacket layer of electrical and optical cables.

Abstract: The disclosure is directed to polymer compositions comprising a matrix polymer component comprising a crystalline or semi-crystalline polymer; and a fibrillated fluoropolymer, a fibrillated fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof. Methods of preparing and using these polymer compositions, as well as articles comprising the polymer compositions, as also described.

Abstract: A polycarbonate composition includes: a continuous polycarbonate phase; discontinuous first domains distributed in the continuous phase, and comprising a core-shell silicone-(meth)acrylate impact modifier comprising a silicone elastomer core and a (meth)acrylate copolymer shell, wherein the first domains have an aspect ratio of at least 1.7, preferably at least 1.8; and discontinuous second domains distributed in the continuous phase, and comprising an alkenyl aromatic-olefin block copolymer impact modifier, wherein the second domains have an aspect ratio of at least 3, preferably at least 4, and a domain size of 6400 square nanometers or less, more preferably 5700 square nanometers or less.

Abstract: An article includes at least two contiguous layers containing a composition that includes a branched polycarbonate, optionally a linear carbonate-containing polymer, and 0 to less than 5 weight percent filler. The composition is characterized by an average mole percent branching of 0.06 to 2.4 mole percent, which is calculated as 100 times moles of branched carbonate units in the branched polycarbonate divided by the sum of moles of linear carbonate units in the branched polycarbonate and the optional linear carbonate-containing polymer. The composition is further characterized by a melt flow rate of 1 to 20 grams per 10 minutes, determined according to ASTM D1238-13 at 300° C. and 1.2 kilogram load. Also described is a method of additive manufacturing utilizing the composition.

Abstract: A method of manufacturing an isolated polyetherimide composition includes combining an as-synthesized polyetherimide comprising units of the formula (I) and a melt-stabilizing amount of a tri(C8-30 acyl) glyceride, an anhydride of the formula (II), or a combination comprising at least one of the foregoing, to provide a mixture; and isolating a polyetherimide composition from the mixture to provide the isolated polyetherimide composition having a change in complex viscosity measured over 30 minutes at 390° C., at a shear rate of 6.28 rad/seconds, strain=5%, and under nitrogen, from +15 to ?20%, preferably from +10 to ?20%, more preferably from +5 to ?20%.

Abstract: A branched polyimide of the formula (I) wherein G is a group having a valence of t, present in an amount of 0.01 to 10 mol %, or 0.05 to 5 mol %, or 0.1 to 4 mol %, or 0.1 to 3 mol %, each of Q, M, D, V, and R are as defined herein, q is 0 or 1, m is 0 or 1, d is 0 or 1, p is 1 or 2, t is 2 to 6, preferably 2 to 4, and each n is independently the same or different, and is 1 to 1,000, provided that the total of all values of n is greater than 4, wherein the branched polyimide has a zero-shear viscosity in a range from 500 to 15,000 Pa·s, a rheology ratio of 1.1 to 5, and a strain hardening ratio of 1 to 6.

Abstract: A reinforced poly(phthalamide) composition comprising 20-80 weight percent of a poly(phthalamide) component comprising 15-55 weight percent of a crystalline poly(phthalamide), and 5-45 weight percent of an amorphous poly(phthalamide); 0.5-60 weight percent of a reinforcing filler; and 0.1-50 weight percent of an additive composition; wherein weight percent is based on the total weight of the reinforced poly(phthalamide) composition and totals 100; and wherein the reinforced poly(phthalamide) composition has a capillary melt viscosity, measured according to ASTM D3835 (2015) at 320° C., at 5000 s?1, that is at least 10% lower than that of the same reinforced poly(phthalamide) composition without the amorphous poly(phthalamide), and a warpage that is at least 15% lower than that of the same reinforced poly(phthalamide) composition without the amorphous poly(phthalamide).

Abstract: A method for producing an aromatic bisimide includes reacting a dialkali metal salt of a dihydroxy aromatic compound with an N-alkyl nitrophthalimide to form a product mixture including the aromatic bisimide. The N-alkyl nitrophthalimide includes 4-nitro-N—(C1-13 alkyl)phthalimide, 3-nitro-N—(C1-13 alkyl)phthalimide, or a combination including at least one of the foregoing, and 4-hydroxy-3,5-dinitro-N—(C1-13 alkyl)phthalimide in an amount of 1-10000 ppm. The aromatic bisimide can be obtained in a yield of greater than 75%, or 90-99.8%. A method for the manufacture of a polyetherimide, a polyetherimide, and an article including the polyetherimide are also disclosed. A mixed acid nitration process for the preparation of an N-alkyl nitrophthalimide is also described.

Abstract: A solution of a poly(phenylene ether) copolymer derived from 2-methyl-6-phenylphenol and a dihydric phenol in a non-halogenated solvent is useful in curable compositions. The copolymer has less than 0.5 weight percent monohydric phenols having identical substituents in the 2- and 6-positions of the phenolic ring, and an absolute number average molecular weight of 1,000 to 10,000 grams/mole. A solution of a poly(phenylene ether) copolymer derived from 2-methyl-6-phenylphenol, 2,6-dimethylphenol, and a dihydric phenol in a non-halogenated solvent is also useful in curable compositions. This copolymer has an absolute number average molecular weight of 1,000 to 5,000 grams/mole. A cured composition is obtained by heating curable compositions composed of the poly(phenylene ether) copolymer solutions and thermoset resins for a time and temperature sufficient to evaporate the non-halogenated solvent and effect curing. The compositions can be used for preparation of composites for printed circuit boards.

Abstract: A multilayer film can comprise: a plurality of layers, preferably 4 layers to 128 layers, comprising: a polymer A layer comprising a polycarbonate copolymer and a polymer B layer comprising a semi-crystalline polyester; wherein a differential solubility parameter (??AB) of polymer A towards polymer B (??AB) is greater than or equal to 2.6 MPa1/2; and an interdiffusion region between each polymer A and polymer B. The multilayer film has a dynamic flexure of greater than or equal to 200,000 cycles, as determine by bending 180° on a 10 mm radius cylinder at a rate of 1 hertz. The multilayer film has a total thickness of 40 ?m to 70 ?m, a transmission at 360 nm to 750 nm of greater than or equal to 89% and a haze of less than or equal to 1%.

Abstract: Provided are compositions comprising partially crystalline polycarbonate particulate having an average cross-sectional dimension of from about 1 ??? to about 200 ????, having from about 10% crystallinity to about 50% crystallinity, and having a weight-average molecular weight, per polystyrene standards, of from about 17,000 to about 40,000 Daltons. The composition exhibits a zero-shear viscosity of less than about 104 Pa s at the melting temperature of the partially crystalline polycarbonate. Related systems and methods for utilizing these compositions in additive manufacturing applications, including selective laser sintering (SLS) applications, are also disclosed. Also provided are additively-manufactured articles made with the disclosed compositions and according to the disclosed methods.

Abstract: A method for producing a reactive intermediate composition, including: reacting a substituted phthalic anhydride of the formula (I) with a diamine of the formula H2N—R—NH2 in the presence of an aromatic dianhydride in an amount of 10 to 50 mole percent based on the total moles of anhydride functionality in the reaction; wherein the reacting is conducted in an aprotic solvent in a reactor, under conditions effective to produce the reactive intermediate composition; and wherein X comprises a halogen or a nitro group, and R comprises a C6-36 aromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain C2-20 alkylene or a halogenated derivative thereof, or a C3-8 cycloalkylene or a halogenated derivative 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: 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: Provided are thermoplastic-nanoparticle compositions that exhibit enhanced powder and melt flow. The disclosed compositions, comprising nanoparticles being silylated, have particular application in additive manufacturing processes, such as selective laser sintering and other processes.

Abstract: A copolycarbonate optical article comprises a polycarbonate composition including: a copolycarbonate having: 2 to 60 mol % of phthalimidine carbonate units, 2 to 90 mol % of high heat carbonate units, and optionally 2 to 60 mol % of bisphenol A carbonate units. The copolycarbonate has less than 100 ppm of each of phthalimidine, high heat bisphenol, and bisphenol A monomers, and less than 5 ppm of various ions, and is prepared from monomers each having a purity of at least 99.6%. The polycarbonate composition has a glass transition temperature of 200° C. to and a yellowness index of less than 30.

Abstract: A separator (104) includes a porous polyetherimide membrane comprising a plurality of pores, wherein at least a portion of the pores comprise an electrolyte composition comprising an ionic liquid.

Abstract: A method of manufacture of a polyetherimide copolymer composition includes contacting a substituted phthalic anhydride and an organic diamine in the presence of diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing solvents at a temperature of greater than 130° C. to provide a bis(phthalimide) composition comprising diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing solvents and a bis(phthalimide); and copolymerizing the bis(phthalimide), a substituted aromatic compound, and an alkali metal salt of a dihydroxy aromatic compound in the presence of diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing to form a polyetherimide copolymer. The method does not require any catalyst either for the imidization or the polymerization.

Abstract: A composition for use in powder bed fusion includes a thermoplastic powder that itself includes an induced crystalline polycarbonate or an induced crystalline polyetherimide. The thermoplastic powder is recycled powder, which means that it is recovered from a powder bed that had undergone a powder bed fusion process. Also described is a method of making an article, the method including: placing an induced crystalline polymeric (polycarbonate or polyetherimide) powder in a powder bed, fusing a portion of the induced crystalline polymeric powder in the powder bed, recovering a least a portion of the crystalline polymeric powder from the powder bed, wherein the recovered powder is not fused, placing the recovered induced crystalline polymeric powder in a second powder bed, and fusing at least a portion of the recovered induced crystalline polymeric powder in the second powder bed to form an amorphous polymer article.