| abstract |
(57) [Summary] [Purpose] Excellent in heat resistance, chemical resistance, various mechanical properties, electrical properties, fluidity, moldability, etc., especially the low proportion of cross-linked polymer and essentially linear There is provided a novel production method by which a high molecular weight polyarylene sulfide can be obtained almost quantitatively in a short time. A method for producing a polyarylene sulfide, which comprises subjecting a cyclic arylene sulfide oligomer to ring-opening polymerization by heating in the presence of an ionic ring-opening polymerization catalyst and a Lewis acid. |