Polyarylene sulfide production method, polyarylene sulfide copolymer production method, and polyarylene sulfide

A method of producing a polyarylene sulfide comprising amino groups in an amount of 400 μmol/g or more and 5,000 μmol/g or less,

• wherein said polyarylene sulfide has a weight reduction rate of 5 wt % or less when heated from 30° C. to 320° C. at a temperature rise rate of 10° C./min,
• the method comprising 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.