The production process of the present invention for polyarylene sulfide is characterized by that in a process for continuously producing polyarylene sulfide by reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, it comprises at least one polymerization reaction step in which two phases of a polymer phase and a solvent phase are separated and in which the polymer phase corresponding to a dispersion phase is a dispersion phase comprising globular droplets and that an end terminator is used in the above polymerization reaction step. According to the present invention, a polymer can be prevented from being adhered onto a polymerization reaction bath to thereby make it possible to discharge a polymer phase and a solvent phase from the polymerization bath in a constant proportion; resultingly, a PAS composition (concentration) in the polymerization bath can always be maintained at a constant value; and polyarylene sulfide having a raised and stabilized molecular weight can continuously be produced.
本发明的聚芳基
硫醚生产工艺的特点是,在通过
硫源与二卤代芳香族化合物在非沸腾有机溶剂中反应连续生产聚芳基
硫醚的工艺中,至少包括一个聚合反应步骤,在该步骤中,聚合物相和溶剂相两相分离,其中与分散相相对应的聚合物相是由球状液滴组成的分散相,并且在上述聚合反应步骤中使用了末端
终止剂。根据本发明,可以防止聚合物附着在聚合反应槽上,从而使聚合物相和溶剂相能够以恒定的比例从聚合槽中排出;因此,聚合槽中的 PAS 成分(浓度)可以始终保持在恒定值;并且可以连续生产出分子量得到提高和稳定的聚芳基
硫醚。