A method of producing a polyarylene sulfide composed of amino groups, the method including allowing at least a dihalogenated aromatic compound, an inorganic sulfurizing agent and a compound (A) to react in an organic polar solvent and in the presence of an alkali metal hydroxide, wherein: said compound (A) is present in an amount of 0.04 moles or more and 0.5 moles or less with respect to 1 mole of said inorganic sulfurizing agent, in a reaction vessel; and said compound (A) is a compound comprising at least one aromatic ring, and having, on said one aromatic ring, an amino group, and at least one functional group selected from the group consisting of hydroxyl group, a salt of hydroxyl group, thiol group and a salt of thiol group.

A polymer including a hydrophilic block and a hydrophobic block, wherein the hydrophilic block includes a unit derived from a compound represented by Chemical Formula 1, and the hydrophobic block includes a unit derived from a fluorine-containing compound, a polymer separator including the same, and a membrane electrode assembly, a fuel cell and a redox flow battery including the same.

A polymer including a hydrophilic block and a hydrophobic block, wherein the hydrophilic block includes a unit derived from a compound represented by Chemical Formula 1, and the hydrophobic block includes a unit derived from a fluorine-containing compound, a polymer separator including the same, and a membrane electrode assembly, a fuel cell and a redox flow battery including the same.

A preparation method of a polyarylene sulfide that may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

A preparation method of a polyarylene sulfide that may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

A triazine ring-containing polymer having a high refractive index and a low birefringence, and being capable of being subjected to injection molding, wherein the polymer having a repeating unit of *-[A-B-]-*, including a structural unit A derived from a triazinedithiol compound, and a structural unit B including an aromatic hydrocarbon group; and a thermoplastic resin, a thermoplastic article, and an optical part including the polymer.

A triazine ring-containing polymer having a high refractive index and a low birefringence, and being capable of being subjected to injection molding, wherein the polymer having a repeating unit of *-[A-B-]-*, including a structural unit A derived from a triazinedithiol compound, and a structural unit B including an aromatic hydrocarbon group; and a thermoplastic resin, a thermoplastic article, and an optical part including the polymer.

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

A triazine ring-containing polymer having a high refractive index and a low birefringence, and being capable of being subjected to injection molding, wherein the polymer having a repeating unit of *-[A-B-]-*, including a structural unit A derived from a triazinedithiol compound, and a structural unit B including an aromatic hydrocarbon group; and a thermoplastic resin, a thermoplastic article, and an optical part including the polymer.