An aromatic polysulfone includes an amino group-containing aromatic polysulfone containing a repeating unit represented by the following general formula (A) and having an amino group at a polymer chain end. The aromatic polysulfone has a weight average absolute molecular weight (Mw) of 20,000 g/mol or more and a reduced viscosity (unit: dL/g) of 0.30 or more.
-Ph1-SO.sub.2-Ph2-O—  (A) In formula (A), Ph1 and Ph2 are each independently a phenylene group which may have a substituent.

The present invention is a polybiphenyl ether sulfone resin substantially composed of a repeating structure of the folio wing Formula (1), and when a test piece with a notch is molded by injection molding the polybiphenyl ether sulfone resin, an Izod impact value of the test piece with a notch after being subjected to heat treatment at 180° C. for 48 hours, measured in accordance with ASTM D256, is 300 J/m or more.

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The present invention is a polybiphenyl ether sulfone resin substantially composed of a repeating structure of the folio wing Formula (1), and when a test piece with a notch is molded by injection molding the polybiphenyl ether sulfone resin, an Izod impact value of the test piece with a notch after being subjected to heat treatment at 180° C. for 48 hours, measured in accordance with ASTM D256, is 300 J/m or more.

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Disclosed herein are bio-based polysulfones, and in particular, bisguaiacol-based PSfs synthesized from (i) at least one polymerizable lignin-based monomer having a structure corresponding to formula (I) wherein each R.sup.1 is independently either an H or a methyl group, wherein R.sup.2, R.sup.3, and R.sup.4 are each individually selected from an H or a methoxy group, and (ii) at least one polymerizable 4,4′-dihalophenyl sulfone as a comonomer. Also, disclosed herein are compositions comprising the bio-based polysulfones and a membrane comprising the composition

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A resin composition with high heat resistance, melt formability, and secondary processability is provided. A resin composition containing: a poly(aryl ether ketone) resin (A); and a poly(ether imide sulfone) resin (B), wherein the poly(aryl ether ketone) resin (A) and the poly(ether imide sulfone) resin (B) are compatibly mixed. The poly(aryl ether ketone) resin (A) is preferably a poly(ether ketone ketone) resin with a repeating unit (a-1) represented by the following formula (1A) and a repeating unit (a-2) represented by the following formula (2A), and the resin composition has one glass transition temperature.

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A semicrystalline polyarylethersulfone (PAES) useful for additive manufacturing may be made by a method comprising: dissolving an amorphous polyarylethersulfone in a polar aprotic halogenated hydrocarbon solvent at a temperature adequate to effectively form a solution, and subsequently and spontaneously bring about reprecipitation of a semicrystalline polyarylethersulfone from the solution. The semicrystalline polyarylethersulfone may have a crystallinity of at least 30% by weight. The semicrystalline PAES, upon being heated, melting and uniting together in layers during additive manufacturing cools without substantially recrystallizing, allows for deformation-free articles to be formed having low residual stress.

A semicrystalline polyarylethersulfone (PAES) useful for additive manufacturing may be made by a method comprising: dissolving an amorphous polyarylethersulfone in a polar aprotic halogenated hydrocarbon solvent at a temperature adequate to effectively form a solution, and subsequently and spontaneously bring about reprecipitation of a semicrystalline polyarylethersulfone from the solution. The semicrystalline polyarylethersulfone may have a crystallinity of at least 30% by weight. The semicrystalline PAES, upon being heated, melting and uniting together in layers during additive manufacturing cools without substantially recrystallizing, allows for deformation-free articles to be formed having low residual stress.

A polyarylene ether copolymer comprising i) at least one block comprising in polymerized form A) isosorbide, isomannide, isoidide or a mixture thereof and B) at least one unit comprising at least one difunctional compound comprising at least one dichlorodiaryl sulfone, a dichlorodiaryl ketone or a mixture thereof and ii) at least one block comprising in polymerized form C) at least one polyalkylene oxide, a process for its preparation and its use in the preparation of coatings, films, fibers, foams, membranes or molded articles.

A method for continuously producing an aromatic polyether according to the present invention includes simultaneously implementing: a supply step of supplying a polymerization solvent, an alkali metal compound, and a raw material; a polymerizing step; and a movement step. The alkali metal compound is supplied as an aqueous mixture. According to the present invention, clogging of piping in the continuous production apparatus can be suppressed, and the aromatic polyether can be stably obtained.

The present disclosure to an electrolyte membrane containing a polyfluorene-based ionomer, and more particularly, to an electrolyte membrane containing a polyfluorene-based ionomer which has a fluorene main chain composed of only a carbon-carbon bond and a side chain composed of a perfluorosulfonic acid group. The electrolyte membrane containing the polyfluorene-based ionomer has high proton conductivity, excellent chemical durability, excellent mechanical property, and excellent volume stability.