In an aspect, a system for manufacturing a freeform mold for an electric aircraft is presented. The system includes a plurality of polymer sheets. The system includes a conveyor. The conveyor is configured to transport the plurality of polymer sheets from a first location to a second location. The system includes a heating element. The heating element is configured to heat at least a portion of a sheet of the plurality of polymer sheets. The system includes a molding device. The molding device is configured to hold at least a portion of the plurality of polymer sheets in a shape. The system includes a compressing device. The compressing device is configured to apply a pressure to at least a portion of the molding device. The plurality of polymer sheets is molded into a freeform shape by the heating element, molding device, and compressing device.

The disclosure generally relates to 3D printed articles prepared from filaments comprising an ionomer (A) prepared from a base resin (B); wherein: base resin (B) is prepared from ethylene and at least one C.sub.3 to C.sub.8 α,β ethylenically unsaturated carboxylic acid monomer; the carboxylic acid moieties of base resin (B) are 10 to 99.5 percent neutralized by zinc or lithium; the at least one C.sub.3 to C.sub.8 α,β ethylenically unsaturated carboxylic acid is present from about 2 weight percent to about 30 weight percent, based on the weight of base resin (B).

A method of forming a polyolefin-perovskite nanomaterial composite which contains oriented electrically and thermally conductive pathways. The method involves milling a polyolefin with particles of a perovskite nanomaterial, molding to forma composite plate, and subjecting the composite plate to an AC voltage. The AC voltage forms oriented electrically and thermally conductive pathways by partial dielectric breakdown of the composite. The presence of the oriented electrically and thermally conductive pathways gives the polyolefin-perovskite nanomaterial electrical and thermal conductivity and dielectric permittivity higher than the polyolefin alone.

The present invention relates to a microneedle comprising a plurality of portions, wherein the plurality of portions comprise a distal end portion and a proximal end portion, at least two of the plurality of portions are made of different polymers, and the distal end portion is made of at least one polymer with high swellability and high viscoelasticity.

A method of forming a polyolefin-perovskite nanomaterial composite which contains oriented electrically and thermally conductive pathways. The method involves milling a polyolefin with particles of a perovskite nanomaterial, molding to forma composite plate, and subjecting the composite plate to an AC voltage. The AC voltage forms oriented electrically and thermally conductive pathways by partial dielectric breakdown of the composite. The presence of the oriented electrically and thermally conductive pathways gives the polyolefin-perovskite nanomaterial electrical and thermal conductivity and dielectric permittivity higher than the polyolefin alone.

A method of forming a polyolefin-perovskite nanomaterial composite which contains oriented electrically and thermally conductive pathways. The method involves milling a polyolefin with particles of a perovskite nanomaterial, molding to form a composite plate, and subjecting the composite plate to an AC voltage. The AC voltage forms oriented electrically and thermally conductive pathways by partial dielectric breakdown of the composite. The presence of the oriented electrically and thermally conductive pathways gives the polyolefin-perovskite nanomaterial electrical and thermal conductivity and dielectric permittivity higher than the polyolefin alone.

Compositions which are curable by, for example, exposure to radiation to form useful articles such as three-dimensionally printed objects are prepared using multistage polymers, polymerizing organic substances and (meth)acrylic polymers. The multistage polymer is effective to toughen and impact modify the cured articles, yet the compositions prior to curing are relatively low in viscosity and agglomerate content even at high loadings of multistage polymer.

A thermoplastic polymer advanceable by solid state polymerization is blended with at least one dissimilar thermoplastic polymer. The blend is solid state polymerized to provide a modified polymer alloy blend having at least one physical or chemical property different from that of the blend before solid state polymerization. The modified polymer alloy blend may be coextruded with a layer of thermoplastic extrusion polymer having a melt viscosity similar to that of the modified polymer alloy.

The invention relates to a method for producing an object from a precursor, comprising the steps: I) depositing a radically cross-linked resin on a carrier so that a layer of a construction material connected to the carrier is obtained, said layer corresponding to a first selected cross-section of the precursor; II) depositing a radically cross-linked resin on a previously applied layer of the construction material so that an additional layer of the construction material is obtained, which corresponds to a further selected cross-section of the precursor and which is connected to the previously applied layer; III) repeating step II) until the precursor is formed, wherein, at least in step II), the deposition of a radically cross-linked resin is carried out by allowing energy to act on a selected region of a radically cross-linkable resin, corresponding to the respectively selected cross-section of the object, wherein the radically cross-linkable resin has a viscosity (23 C., DIN EN ISO 2884-1) of =5 mPas to =100000 mPas. The radically cross-linkable resin comprises a curable component, in which NCO groups which are blocked with a blocking agent, compounds having at least two Zerewitinoff-active H atoms and olefinic CC double bonds are present, wherein the blocking agent is an isocyanate or the blocking agent is selected in such a manner that, after deblocking of the NCO group, no release of the blocking agent as a free molecule or as a part of other molecules or molecule parts occurs. Following step III), step IV) is carried out: IV) treating the precursor obtained according to step III) under conditions which are sufficient to at least partially deblock NCO groups which are present in the radically cross-linked resin of the obtained precursor, and to react the resulting functional groups with compounds having at least two Zerewitinoff-active H atoms, with the result that the object is obtained.

In the present invention, a photocurable composition for a support material for an inkjet 3D printer comprises a water-soluble ethylenically unsaturated monomer containing an ionic group and a counter ion, and a water content is not more than 10 mass % in 100 mass % of the photocurable composition for a support material. It is preferably that the photocurable composition for a support material for an inkjet 3D printer further comprises a photopolymerization initiator.