MOLDING MATERIAL, PREPREG, FIBER-REINFORCED COMPOSITE MATERIAL, AND PROCESS FOR PRODUCTION OF FIBER-REINFORCED MOLDING BASE MATERIAL

摘要

A molding material comprising continuous reinforcing fiber bundles (A), either a polyarylene sulfide prepolymer (B) which contains at least 50wt% of a cyclic polyarylene sulfide and has a weight-average molecular weight of less than 10,000 or a polyarylene sulfide (B') which has a weight-average molecular weight of 10,000 or above and a degree of dispersion of 2.5 or below, and a thermoplastic resin (C); a prepreg obtained by impregnating a reinforcing fiber with a resin composition containing the polyarylene sulfide prepolymer (B); and a process for production of fiber-reinforced molding base material which comprises the step (I) of feeding a continuous reinforcing fiber bundle continuously, the step (II) of incorporating the reinforcing fiber bundle with a cyclic polyarylene sulfide; the step (III) of heating the composite material obtained in the step (II) to conduct ring-opening polymerization of the cyclic polyarylene sulfide into a polyarylene sulfide, and the step (IV) of cooling the composite material obtained in the step (III) and taking off the composite material.