Abstract: Provided is a polyether ether ketone, comprising a repeating unit represented by the following formula (1), satisfying one or both of the following conditions (A) and (B), and having a hydroxy group at one terminal or both terminals of a main chain of the polyether ether ketone: (A) a fluorine atom content a is less than 2 mg/kg; and (B) a chlorine atom content b is 2 mg/kg or more.

Abstract: Provided is a method for producing an aromatic polyether, comprising reacting 4,4?-dichlorobenzophenone and hydroquinone in the presence of a potassium carbonate satisfying at least one of the following conditions (A) and (B): (A) the potassium carbonate has a bulk density of 1.2 g/ml or less; and (B) an average particle diameter D (µm) and a specific surface area S (m2/g) of the potassium carbonate satisfy D/S?600.

Abstract: Provided is a polyether ether ketone, comprising a repeating unit represented by the following formula (1), the polyether ether ketone having a crystallization temperature Tc of 255° C. or more, and satisfying one or both of the following conditions (A) and (B): (A) a fluorine atom content a is less than 2 mg/kg; and (B) a chlorine atom content b is 2 mg/kg or more.

Abstract: In a standing pipe body (210), an adsorbent layer (240) filled with active magnesium silicate as an adsorbent and an alumina layer (250) positioned therebelow are arranged. A sample solution containing dioxins is applied into the pipe body (210) from the top, and an aliphatic hydrocarbon solvent is subsequently supplied into the pipe body (210) from the top. The aliphatic hydrocarbon solvent having dissolved dioxins in the sample solution passes through the adsorbent layer (240) and the alumina layer (250) in this order, and is discharged from a bottom of the pipe body (210). At this point, a dioxin group including non-ortho PCBs, PCDDs, and PCDFs is selectively trapped by the adsorbent layer (240), and mono-ortho PCBs are selectively trapped by the alumina layer (250).

Abstract: Provided is a polycarbonate-based resin composition, including: a polycarbonate-based resin (A) containing at least one of a branched polycarbonate-based resin (A-1) or an aromatic polycarbonate-based resin (A-2) except the branched polycarbonate-based resin (A-1); a fluorine-containing compound (B) having such a hydrocarbon structure that all hydrogen atoms of the hydrocarbon structure are substituted with fluorine; and a polyether (C) having a polyoxyalkylene structure, wherein a content of the polyether (C) having a polyoxyalkylene structure is 0.02 part by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the polycarbonate-based resin (A), and wherein a mass ratio of the fluorine-containing compound (B) to the polyether (C) is 15.00 or less.

Abstract: Provided is a polycarbonate-based resin having a ratio of an amine terminal to all terminal groups of 1.0 mol % or more.

Abstract: Provided is a carbonate-olefin-based copolymer including a polycarbonate block, an olefin-based polymer block, and a specific constituent unit.

Abstract: Provided is a branched polycarbonate resin, including a constituent unit represented by the general formula (I?).

Abstract: Provided is a branched polycarbonate resin, including a constituent unit represented by the general formula (I?).