Abstract: Thermoplastic compositions, methods of making the compositions, and articles including the compositions are described. The thermoplastic compositions can contain 30 wt.% to 70 wt.% of a semi-crystalline polyester, 10 wt.% to 50 wt.% of a halogenated polycarbonate, 3 wt.% to 25 wt.% of a first poly(carbonate-siloxane) copolymer having a siloxane content of less than 30 wt.%, wherein the siloxane content is based on the total weight of the first poly(carbonate-siloxane) copolymer, and 3 wt.% to 25 wt.% of a second poly(carbonate-siloxane) copolymer having a siloxane content of greater than 30 wt.%, wherein the siloxane content is based on the total weight of the second poly(carbonate-siloxane) copolymer.

Abstract: A filament for use in forming a support structure in fused filament fabrication, the filament comprising an amorphous, thermoplastic resin further comprising Bisphenol Isophorone carbonate units and Bisphenol A carbonate units, wherein the Bisphenol Isophorone carbonate units are 30 to 50 mole percent of the total of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units in the resin, and wherein the resin has a glass transition temperature from 165° C. to 200° C. The composition used to form the support filament exhibits a desirable combination of filament formability, printability, lack of significant oozing from the printer nozzle, and good ease of mechanical separation from the build material at room temperature after printing.

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 composition includes specific amounts of a block polycarbonate-polysiloxane, a core-shell impact modifier, and, optionally, a block polyestercarbonate. The core-shell impact modifier has a core that includes polydimethylsiloxane or poly(butyl acrylate) or both, and a shell includes a poly(methyl methacrylate). The block polyestercarbonate-polysiloxane and the block polyester-carbonate are present in a total amount of greater than 60 weight percent to 99 weight percent. And the block polyestercarbonate-poly-siloxane contributes 0.3 to 0.7 weight percent of dimethylsiloxane units to the composition. Also described are an article comprising the composition, and a method of additive manufacturing utilizing the composition.

Abstract: A polyetherimide composition includes specific amounts of a polyetherimide, a block polyestercarbonate, a block poly-carbonate-polysiloxane, and a core-shell impact modifier in which the core includes a polysiloxane and the shell includes a poly(alkyl (meth)acrylate). Relative to a corresponding composition lacking the core-shell impact modifier, the polyetherimide composition exhibits increased impact strength while substantially retaining flame retardancy. Also described are associated articles, including articles formed by additive manufacturing, and a method of additive manufacturing.

Abstract: A polyetherimide composition includes specific amounts of a polyetherimide, a block polyestercarbonate, a block poly-carbonate-polysiloxane, and a core-shell impact modifier in which the core includes a polysiloxane and the shell includes a poly(alkyl (meth)acrylate). Relative to a corresponding composition lacking the core-shell impact modifier, the polyetherimide composition ex-hibits increased impact strength while substantially retaining flame retardancy. Also described are associated articles, including articles formed by additive manufacturing, and a method of additive manufacturing.

Abstract: Provided herein are polycarbonate—polycarbonate-siloxane block copolymers, which compositions are useful in additive manufacturing applications. Additive manufactured articles made with the disclosed compositions exhibit mechanical properties that are greatly improved over existing additive manufactured polycarbonate articles, and additive manufactured articles made with the disclosed compositions exhibit mechanical properties that approach the corresponding properties of injection molded articles.

Abstract: A filament for use in forming a support structure in fused filament fabrication, the filament comprising an amorphous, thermoplastic resin further comprising Bisphenol Isophorone carbonate units and Bisphenol A carbonate units, wherein the Bisphenol Isophorone carbonate units are 30 to 50 mole percent of the total of Bisphenol A carbonate units and Bisphenol Isophorone carbonate units in the resin, and wherein the resin has a glass transition temperature from 165° C. to 200° C. The composition used to form the support filament exhibits a desirable combination of filament formability, printability, lack of significant oozing from the printer nozzle, and good ease of mechanical separation from the build material at room temperature after printing.

Abstract: A filament for use in forming a support structure in fused filament fabrication includes an amorphous, thermoplastic resin having a glass transition temperature from 165° C. to 350° C., and 0.5 to 4.5 weight percent of a high viscosity silicone having a kinematic viscosity from 60,000 to 100 million centistokes. The composition used to form the support filament exhibits a desirable combination of filament formability, printability in additive manufacturing, lack of significant oozing from the printer nozzle, and ease of mechanical separation from the build material at room temperature after printing.

Abstract: A core-shell filament useful for fused filament fabrication includes a core, and a shell surrounding and in contact with the core. The core contains a block polyetherimide-polysiloxane. The shell contains a polyetherimide. When the filament is used in fused filament fabrication for printing a three-dimensional article, the core material remains surrounded by shell material. So, the printed article exhibits good interlayer adhesion provided by the shell material, and good ductility provided by the core material.

Abstract: Disclosed herein are methods that includes using a water-degradable (e.g., autoclavable) support material together with a high-heat build material (e.g., polyetherimide or PEI). When the support material is autoclaved for a period of time, the support material becomes brittle and then disintegrates into powder and therefore can be removed from the model or build material, leaving behind a part formed from the model material that includes features (e.g., cavities, channels, etc.) formerly occupied by the support material.

Abstract: A method of forming a three dimensional object comprising: depositing a layer of thermoplastic polymeric material in a preset pattern on a platform to form a deposited layer; directing an energy source, via an energy beam at an energy source target area on the deposited layer to increase the surface energy of the deposited layer at the energy source target area; contacting the energy source target area with a subsequent layer wherein the subsequent layer is deposited along a path of the preset pattern; wherein directing an energy source at the energy source target area comprises applying energy to the layer at an area preceding the depositing of the subsequent layer to that area; and repeating the preceding steps to form the three dimensional object.

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: 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: Disclosed herein are methods that includes using a water-degradable (e.g., autoclavable) support material together with a high-heat build material (e.g., polyetherimide or PEI). When the support material is autoclaved for a period of time, the support material becomes brittle and then disintegrates into powder and therefore can be removed from the model or build material, leaving behind a part formed from the model material that includes features (e.g., cavities, channels, etc.) formerly occupied by the support material.

Abstract: The present disclosure provides, inter alia, additive-manufactured articles formed from monofilaments that comprise blends of amorphous polymer, crystalline polymer, and core-shell rubber modifier. These articles exhibit improved elongation and impact over existing materials, and the disclosed technology allows for the formation of additive-manufactured articles that have mechanical properties approaching those of corresponding injection-molded articles.

Abstract: Provided herein are polycarbonate—polycarbonate-siloxane block copolymers, which compositions are useful in additive manufacturing applications. Additive manufactured articles made with the disclosed compositions exhibit mechanical properties that are greatly improved over existing additive manufactured polycarbonate articles, and additive manufactured articles made with the disclosed compositions exhibit mechanical properties that approach the corresponding properties of injection molded articles.

Abstract: Disclosed is a method of making an article, the method comprising: melt extruding a plurality of layers comprising one or more polymer compositions in a preset pattern, wherein the extruded layers comprise one or more first layers comprising a first polymer composition A, and one or more second layers comprising a second polymer composition B having a chemical composition different from the first polymer composition A, having a glass transition temperature (Tg) that is 5-100 degrees C. lower than polymer composition A, and which acts as a adhesion promotion layer between two layers comprising first polymer composition A; and fusing the plurality of layers to provide the article.

Abstract: A method of making an article, the method including forming a plurality of layers of a polymer composition in a preset pattern, wherein multiple layers comprise the same polymer composition, and at least two adjacent layers comprise a first layer extruded at a first temperature A; and a second layer extruded on the first layer at a second temperature B, wherein the first and the second temperatures A and B differ by at least 5 C; and fusing the plurality of layers to provide the article. Further disclosed is an article made by the above process.

Abstract: Disclosed here is a method of making an article, the method including melt extruding a plurality of layers comprising one or more polymers in a preset pattern, wherein the extruded layers comprise one or more first layers comprising a first polymer composition A, and one or more second layers comprising a second polymer composition B different from polymer composition A, and fusing the plurality of layers to provide the article. Further disclosed is an article made by the above process.