POLYARYLENE SULFIDE AND PROCESS FOR PRODUCING THE SAME

摘要

A polyarylene sulfide characterized by having a melt viscosity, measured at a shear rate of 1216 sec<-1> at 310°C, of 1 to 3000 Pa.s; a pH value, measured in a mixed solvent of water/acetone (vol.ratio=2:1), of 7.0 to 12.0; a crystallization temperature, measured in the course of temperature drop at a rate of 10°C/min from the state of melt at 340°C, of 220°C or below; and a whiteness degree of melt molded item of 70 or higher. There is further provided a process for producing the polyarylene sulfide.