Abstract: A conductive composite includes a first layer of elastomeric polymer, a layer of electrically conductive paste on the first layer of elastomeric polymer, and a second layer of elastomeric polymer on the layer of electrically conductive paste. A reinforcement mesh is in contact with the layer of electrically conductive paste.

Abstract: Disclosed are conductive composites comprising a polymer, a conductor selected from metals and metal alloys, a compatibilizing agent, and an optional thickening agent.

Abstract: Aspects of the present disclosure provide fluoropolymers and methods for forming and using such fluoropolymers. Fluoropolymers include polyfluorobenzoxazines and polyfluoroimides. Methods for forming polyphthalonitriles are also provided. The present disclosure is further directed to compositions containing one or more fluoropolymers and one or more metal oxides.

Abstract: This invention provides resin formulations which may be used for 3D printing and pyrolyzing to produce a ceramic matrix composite. The resin formulations contain a solid-phase filler, to provide high thermal stability and mechanical strength (e.g., fracture toughness) in the final ceramic material. The invention provides direct, free-form 3D printing of a preceramic polymer loaded with a solid-phase filler, followed by converting the preceramic polymer to a 3D-printed ceramic matrix composite with potentially complex 3D shapes or in the form of large parts. Other variations provide active solid-phase functional additives as solid-phase fillers, to perform or enhance at least one chemical, physical, mechanical, or electrical function within the ceramic structure as it is being formed as well as in the final structure. Solid-phase functional additives actively improve the final ceramic structure through one or more changes actively induced by the additives during pyrolysis or other thermal treatment.

Abstract: A cure promoter composition is disclosed, including an accelerator which may include a thiocarbamate, a hydrated thiocarbamate, a dithiocarbamate, a thiazole, a mercaptothiazole, a sulfenamide, a thiazolesulfenamide, a metal salt of thiocarbamate, sulfur chloride, or combinations thereof. The cure promoter composition also includes a compatibilizing carrier, one or more organic solvents, a catalyst, an optional reducing agent, an optional reactive silane, an optional reactive organometallic, an optional gelling agent, and an optional aqueous component.

Abstract: An adhesion promoter composition is disclosed. The adhesion promoter composition also includes one or more reactive silanes which includes a mercaptopropyltrimethoxysilane, a glycidoxypropyltrimethoxysilane, or combinations thereof. The adhesion promoter composition also includes one or more reactive organometallics. The composition may include one or more organic solvents, an optional one or more gelling agents, and an optional one or more functional additives.

Abstract: An adhesion promoter composition is disclosed. The adhesion promoter composition includes a first reactive silane compound and a second reactive silane compound, where the second reactive silane is different from the first. The adhesion promoter composition also includes one or more organic solvents and an organic base. A method for applying the adhesion promoter composition is also disclosed.

Abstract: An anti-fouling coating is provided, containing a continuous matrix comprising a first component; a plurality of inclusions comprising a second component, wherein the first component is a low-surface-energy polymer having a surface energy, and the second component is a hygroscopic material containing one or more ionic species. The low-surface-energy polymer and the hygroscopic material are chemically connected ionically or covalently, such as in a segmented copolymer composition comprising fluoropolymer soft segments and ionic species contained within the soft segments. The continuous matrix and the inclusions form a lubricating surface layer in the presence of humidity. Coefficient-of-friction experimental data is presented for various sample coatings. The incorporation of ionic species into the polymer chain backbone increases the hygroscopic behavior of the overall structure.

Abstract: A conductive composite includes a first layer of elastomeric polymer, a layer of conductive fluorofluid on the first layer of elastomeric polymer, and a second layer of elastomeric polymer on the layer of conductive fluorofluid.

Abstract: Examples of the present disclosure provide fluoropolymers and methods for forming and using such fluoropolymers. Fluoropolymers include polyfluorobenzoxazines and polyfluoroimides. Methods for forming polyphthalonitriles are also provided. The present disclosure is further directed to compositions containing one or more fluoropolymers and one or more metal oxides.

Abstract: Some variations provide a polysulfide-based copolymer containing first repeat units comprising S8-derived sulfur atoms bonded via sulfur-sulfur bonds; and second repeat units comprising an organic, non-aromatic thiol molecule. Other variations provide a polysulfide-based copolymer containing first repeat units comprising S8-derived sulfur atoms bonded via sulfur-sulfur bonds; and second repeat units comprising an organic, non-aromatic unsaturated molecule, wherein the polysulfide-based copolymer has a total sulfur concentration of about 10 wt % or greater. Other variations provide a polysulfide-based copolymer containing first repeat units comprising S8-derived sulfur atoms bonded via sulfur-sulfur bonds; second repeat units comprising an organic, non-aromatic thiol molecule; and third repeat units comprising an organic, non-aromatic unsaturated molecule.

Abstract: Low-friction fluorinated coatings are disclosed herein. A preferred low-friction material contains a low-surface-energy fluoropolymer having a surface energy between about 5 mJ/m2 to about 50 mJ/m2, and a hygroscopic material that is covalently connected to the fluoropolymer in a triblock copolymer, such as PEG-PFPE-PEG. The material forms a lubricating surface layer in the presence of humidity. An exemplary copolymer comprises fluoropolymers with average molecular weight from 500 g/mol to 20,000 g/mol, wherein the fluoropolymers are (?,?)-hydroxyl-terminated and/or (?,?)-amine-terminated, and wherein the fluoropolymers are present in the triblock structure T-(CH2—CH2—O)—CH2—CF2—O—(CF2—CF2—O)m(CF2—O)n—CF2—CH2—(O—CH2—CH2)p-T where T is a hydroxyl or amine terminal group, p=1 to 50, m=1 to 100, and n=1 to 100. The copolymer also contains isocyanate species and polyol or polyamine chain extenders or crosslinkers possessing a functionality of preferably 3 or greater.

Abstract: This invention provides durable, low-ice-adhesion coatings with excellent performance in terms of ice-adhesion reduction. Some variations provide a low-ice-adhesion coating comprising a microstructure with a first-material phase and a second-material phase that are microphase-separated on an average length scale of phase inhomogeneity from 1 micron to 100 microns. Some variations provide a low-ice-adhesion material comprising a continuous matrix containing a first component; and a plurality of discrete inclusions containing a second component, wherein the inclusions are dispersed within the matrix to form a phase-separated microstructure that is inhomogeneous on an average length scale from 1 micron to 100 microns, wherein one of the first component or the second component is a low-surface-energy polymer, and the other is a hygroscopic material. The coatings are characterized by an AMIL Centrifuge Ice Adhesion Reduction Factor up to 100 or more.

Abstract: Infrared-transparent and damage-resistant polymer optics with LWIR and/or MWIR transparency are provided. Some variations provide an optic containing at least 50 wt % of an infrared-transparent polymer, wherein the infrared-transparent polymer has a carbon-free polymer backbone, wherein the optic is characterized by at least 80% average transmission of radiation over a wavenumber band with cumulative wavenumber width of at least 1000 cm?1 contained within wavelengths from 3.1 ?m to 5 ?m and/or from 8.1 ?m to 12 ?m, and wherein the average transmission is defined as the percentage ratio of radiation intensity through an optic thickness of 25 microns divided by incident radiation intensity. Many polymer compositions and pendant groups are disclosed for use in the polymer optics.

Abstract: Some variations provide a multiphase polymer composition comprising a first polymer material and a second polymer material that are chemically distinct, wherein the first polymer material and the second polymer material are microphase-separated on a microphase-separation length scale from about 0.1 microns to about 500 microns, wherein the multiphase polymer composition comprises first solid functional particles selectively dispersed within the first polymer material, and wherein the first solid functional particles are chemically distinct from the first polymer material and the second polymer material. Some embodiments provide an anti-corrosion composition comprising first corrosion-inhibitor particles or precursors selectively dispersed within the first polymer material, wherein the multiphase polymer composition optionally further comprises second corrosion-inhibitor particles or precursors selectively dispersed within the second polymer material.

Abstract: Resistive inks and method of making resistive inks that utilize a phthalonitrile resin as a curable component in the inks are disclosed. In one example, a resistive ink is provided. The resistive ink comprises a solvent, a thermally-curable phthalonitrile-based resin dissolved in the solvent, and one or more conductive fillers. In some examples, the phthalonitrile resin can comprise a B-staged material.

Abstract: Some variations provide a method of forming a transparent icephobic coating, comprising: obtaining a hardenable precursor comprising a first component and a plurality of inclusions containing a second component, wherein one of the first component or the second component is a low-surface-energy polymer, and the other is a hygroscopic material; applying mechanical shear and/or sonication to the hardenable precursor; disposing the hardenable precursor onto a substrate; and curing the hardenable precursor to form a transparent icephobic coating. The coating contains a hardened continuous matrix containing regions of the first component separated from regions of the second component on an average length scale of phase inhomogeneity from 10 nanometers to 10 microns, such as less than 1 micron, or less than 100 nanometers. The transparent icephobic coating may be characterized by a light transmittance of at least 50% at wavelengths from 400 nm to 800 nm, through a 100-micron coating.

Abstract: Some variations provide a reworkable ionomer composition comprising: a polymer containing a plurality of ionic monomers disposed in a chain backbone of the polymer, wherein the ionic monomers have a monomer charge polarity that is either positive or negative; and a plurality of ionic species disposed within the chain backbone of the polymer, wherein the ionic species have opposite charge polarity compared to the monomer charge polarity, wherein the ionic species and the ionic monomers are ionically bonded, and wherein the ionic species are capable of undergoing a reversible oxidation-state transition of at least +1 or ?1 when in the presence of a redox reagent. The polymer may be selected from the group consisting of polyurethanes, polyacrylates, polyamides, polyesters, polyureas, polyurethane-ureas, polysiloxanes, polycarbonates, and combinations thereof. Many options for ionic monomers and ionic species are disclosed.

Abstract: Some variations provide a method of forming a transparent icephobic coating, comprising: obtaining a hardenable precursor comprising a first component and a plurality of inclusions containing a second component, wherein one of the first component or the second component is a low-surface-energy polymer, and the other is a hygroscopic material; applying mechanical shear and/or sonication to the hardenable precursor; disposing the hardenable precursor onto a substrate; and curing the hardenable precursor to form a transparent icephobic coating. The coating contains a hardened continuous matrix containing regions of the first component separated from regions of the second component on an average length scale of phase inhomogeneity from 10 nanometers to 10 microns, such as less than 1 micron, or less than 100 nanometers. The transparent icephobic coating may be characterized by a light transmittance of at least 50% at wavelengths from 400 nm to 800 nm, through a 100-micron coating.

Abstract: Some variations provide a multiphase polymer composition comprising a first polymer material and a second polymer material that are chemically distinct, wherein the first polymer material and the second polymer material are microphase-separated on a microphase-separation length scale from about 0.1 microns to about 500 microns, wherein the multiphase polymer composition comprises first solid functional particles selectively dispersed within the first polymer material, and wherein the first solid functional particles are chemically distinct from the first polymer material and the second polymer material. Some embodiments provide an anti-corrosion composition comprising first corrosion-inhibitor particles or precursors selectively dispersed within the first polymer material, wherein the multiphase polymer composition optionally further comprises second corrosion-inhibitor particles or precursors selectively dispersed within the second polymer material.