A crosslinked object of a polybenzoxazine-based compound formed of a polymerized resultant of a first monofunctional benzoxazine-based monomer or a second multifunctional benzoxazine-based monomer with a crosslinkable compound, an electrolyte membrane including the crosslinked object, a method of preparing the electrolyte membrane, and a fuel cell employing the electrolyte membrane including the crosslinked object.

Polybenzoxazine-based compound, electrolyte membrane including the same, and fuel cell employing the electrolyte membrane

Crosslinked polybenzoxazines obtained by crosslinking a monofunctional first benzoxazine monomer and a multifunctional second benzoxazine monomer with a crosslinkable compound, an electrolyte membrane including the same, a method of preparing the electrolyte membrane, a fuel cell including the electrolyte membrane having the crosslinked polybenzoxazines using the method. The crosslinked polybenzoxazines have strong acid trapping capability, improved mechanical properties, and excellent chemical stability as it does not melt in polyphosphoric acid. Even as the amount of impregnated proton carrier and the temperature are increased, mechanical and chemical stability is highly maintained, and thus the electrolyte membrane can be effectively used for fuel cells at a high temperature.

Polybenzoxazines, electrolyte membrane comprising the same, and fuel cell employing the electrolyte membrane

A benzoxazine-based monomer includes a halogen atom-containing functional group and a nitrogen-containing heterocyclic group. A polymer formed from the benzoxazine-based monomer may be used in an electrode for a fuel cell and electrolyte membrane for a fuel cell.

Benzoxazine-based monomer, polymer thereof, electrode for fuel cell including the polymer, electrolyte membrane for fuel cell including the polymer, and fuel cell using the electrode

A curable polyphenylene ether resin (PPE) composition which comprises (a) a PPE and (b) a compound having a 3,4-dihydro-3-substituted-1,3-benzoxazine skeleton or a mixture thereof with a polymer thereof formed by ring-opening polymerization; a cured PPE composition obtained by curing the curable PPE composition; and a laminated structure containing the curable or cured PPE composition. The curable PPE composition gives a cured composition excellent in chemical resistance, moisture resistance, dielectric properties, heat resistance, flame retardancy, and dimensional stability. The cured composition is hence usable as dielectric, insulating, and heat-resistant materials or the like in fields such as the electrical/electronic industry and the space/airplane industry. The curable composition is advantageously usable especially as a resin composition for forming insulating layers in, e.g., printed circuit boards having a circuit layer on one side or on each side or having many circuit layers, flexible printed circuit boards, semirigid substrates, and substrates having excellent radiating properties.

Thermosetting polyphenylene ether resin composition, cured resin composition obtained therefrom, and laminated structure

A polybenzimidazole-base complex includes a polybenzimidazole-based material and a base, wherein a peak corresponding to NH of an imidazole ring of the polybenzimidazole-based material does not appear at a chemical shift of 12 to 15 ppm in a 1H nuclear magnetic resonance (1H-NMR) spectrum of the polybenzimidazole-base complex. A crosslinked material may be formed as a polymerization product of a polybenzimidazole-base complex and a benzoxazine-based monomer. The crosslinked material may be used an electrolyte membrane for a fuel cell comprising the crosslinked material, and a fuel cell may include the electrolyte membrane.

Polybenzimidazole-base complex, crosslinked material of polybenzoxazines formed thereof, and fuel cell using the same

PROBLEM TO BE SOLVED: To provide a cured film excellent in transparency, heat resistance, chemical resistance, surface smoothness, tight adhesion, and sputtering resistance, and to provide a resin composition giving the cured film SOLUTION: The composition comprises: a polyamic acid which is a product of the reaction of a tetracarboxylic dianhydride, a diamine, and an aminosilicon compound; an epoxy resin; an epoxy hardener; and a solvent The amount of the epoxy resin is 50-250 ptswt per 100 ptswt the polyamic acid, while that of the epoxy hardener is 1-80 ptswt per 100 ptswt the epoxy resin

Itami Setsuo

Papers

Thermosetting resin composition