| abstract |
[PROBLEMS] To provide a method for purifying polyarylene sulfide (hereinafter abbreviated as PAS), a method for purifying PAS in which corrosiveness to a production equipment or a mold during molding is suppressed, In particular, a PAS having improved reactivity with an epoxysilane-based coupling agent in quality and improved mechanical strength of a molded product is provided. SOLUTION: At any stage of the purification process after desolvation, the pressure condition of PAS and carbon dioxide or carbonated water is set at 0. More than 1MPa and 2.0MPa or less, temperature condition is 10 Purify by contact at １００100 ° C. |