Provided is a production process for polyarylene sulfide having a high molecular weight and an excellent heat stability. It is a production process for polyarylene sulfide by reacting a dihalogenoaromatic compound with metal sulfide in a polar solvent, wherein all or a part of water required for the reaction is added on a condition that the reaction system is 100° C. or higher, whereby obtained is polyarylene sulfide which is reduced in an intrinsic viscosity [&eegr;] by 0.05 deciliter/g or less at 206° C. when added to an N-methyl-2-pyrrolidone solvent is the polyarylene sulfide of an amount equivalent to the solvent and it is maintained at 265° C. for 8 hours.
本发明提供了一种具有高分子量和优异热稳定性的聚芳基
硫醚的生产工艺。它是一种聚芳基
硫醚的生产工艺,其方法是在极性溶剂中使二卤代芳香族化合物与
金属
硫化物反应,在反应体系温度为 100°C 或更高的条件下,加入反应所需的全部或部分
水,从而得到本征粘度降低的聚芳基
硫醚。在 206 摄氏度时,内在粘度[&eegr;]降低 0.05 分升/克或更低。