A resin composition includes: a polyphenylene ether compound having at least one of groups expressed by formulas (1) and (2), a curing agent reactable with the polyphenylene ether compound, a styrene-based polymer having structural units expressed by formulas (3) and (4); and an inorganic filler containing boron nitride, wherein a content of the inorganic filler is 100 to 320 parts by mass relative to 100 parts by mass of a total of the polyphenylene ether compound, the curing agent, and the styrene-based polymer.

Provided is a thin film with good durability that is easy to handle during storage and use. The film contains, as a rubber component, at least a copolymer having a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit, and having a proportion of a butylene unit of 0 mol %, where a filler content is 15 parts by mass or less with respect to 100 parts by mass of the rubber component, no cross-linking agent is contained, and the thickness is 300 μm or less.

Provided herein are membrane electrode assemblies (MEAs) for CO.sub.x reduction and carbon dioxide reduction reactors (CRRs) that include MEAs.

This disclosure relates to a curable composition that includes at least first, second, and third polymers. The first polymer includes a first monomer unit and a second monomer unit different from the first monomer unit, in which the first monomer unit has the structure of formula (I) defined in the Specification and the second monomer unit has the structure of formula (II) defined in the Specification. The second polymer includes at least about 60 wt % of a styrene monomer unit; and the third polymer includes at most about 60 wt % of a styrene monomer unit. This disclosure also relates to using the composition to form a free-standing film, a laminate, a prepreg, and/or a printed circuit board.

Embodiments of the invention relate generally to anion exchange membranes and, more particularly, to anion exchange membranes comprising a styrene block copolymer and methods for their manufacture. In one embodiment, the invention provides a polymer according to formula IV, wherein x and y are mol %, QA is or each of R.sub.1 and R.sub.2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain.

A crosslinkable copolymer is provided. The crosslinkable copolymer has pendant cationic nitrogen-containing groups with some, but not all, of these pendant groups further including a (meth)acryloyl group. The (meth)acryloyl groups can react to form a crosslinked copolymer that is ionically conductive. The crosslinked copolymer can be used to provide an anion exchange membrane that can be used in electrochemical cells such as fuel cells, electrolyzers, batteries, and electrodialysis cells.

A styrene resin extruded foam includes graphite and a styrene resin. The graphite is in an amount of 0.5 to 10.0 parts by weight relative to 100 parts by weight of the styrene resin. The graphite has an average particle diameter of 2.5 μm to 9 μm. A laser scattering intensity is not less than 5 {%/(mg/mL)}/wt % per unit solution concentration of the graphite as measured by a particular method.

Reversibly cross-linkable foam is provided. The reversibly cross-linked foam includes a first polymeric material, at least one reversibly cross-linkable monomer polymerized with the first polymeric material, and at least one blowing agent. The reversibly cross-linkable co-polymeric foam is thermally stable at temperatures of at least 10 degrees higher than otherwise identical polymeric foam that does not include the reversibly cross-linkable agent polymerized with the first polymeric material.

Disclosed are such co-polymers of vinylidene substituted aromatic monomers and unsaturated compounds containing nucleophilic groups chain extended by a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated compounds having pendant electrophilic groups which copolymerize with the one or more vinylidene aromatic monomers. Disclosed are compositions comprising vinylidene substituted aromatic monomers and unsaturated compounds containing nucleophilic groups and a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated compounds having pendant electrophilic groups, which may optionally, contain salts of alkaline earth metals, alkali metals, transition metals, post transition metals or metalloids. Disclosed are methods of preparing such chain-extended and/or branched copolymers.

The present invention relates to a method of preparing a hierarchically porous polymer and a hierarchically porous polymer prepared thereby. The method comprises the steps of: (a) polymerizing an external oil phase of a high internal phase emulsion (HIPE) consisting aqueous droplets to produce a cross-linked block copolymer; (b) obtaining a macroporous polymer with interconnected macropores by removing the aqueous droplets; and (c) treating the obtained porous polymer with a base, thereby obtaining a hierarchically porous polymer having three-dimensional mesopores formed in the macroporous walls. According to the method, the macropore size and mesopore size of the hierarchically porous polymer can all be controlled. The hierarchically porous polymer prepared by the method can easily separate polymers having different sizes, and thus is highly useful in the polymer separation field.