In the preparation of polyarylene sulfide (PAS) by reacting an alkali metal sulfide with a dihaloaromatic compound in an organic amide solvent to obtain a polyarylene sulfide slurry and subjecting the slurry to acid treatment, an acid or hydrogen salt is added to the slurry in such an amount that a pH of the slurry is more than 7.0 and at most 11.0 to carry out the acid treatment. Alternatively, a zinc compound in an amount of 0.1 to 1.5 mole % per mole of the alkali metal sulfide supplied is added to the polyarylene sulfide slurry to treat the slurry, and, then, an acid or hydrogen salt in an amount of at least 0.2 mole % per mole of the alkali metal sulfide supplied is added.
The PAS thus obtained has high crystallization speed, high whiteness, high mechanical strength and high melt viscosity, V
6
.
在制备聚芳基
硫醚(PAS)时,将碱
金属
硫化物与二卤代芳香族化合物在有机酰胺溶剂中进行反应,得到聚芳基
硫醚浆料,然后对浆料进行酸处理,在浆料中加入一定量的酸或氢盐,使浆料的 pH 值大于 7.0,最高不超过 11.0,以进行酸处理。或者,在聚芳基
硫醚浆料中加入
锌化合物,加入量为每摩尔碱
金属
硫化物 0.1 至 1.5 摩尔%,以处理浆料,然后加入酸或氢盐,加入量为每摩尔碱
金属
硫化物至少 0.2 摩尔%。
这样得到的 PAS 具有高结晶速度、高白度、高机械强度和高熔融粘度,V
6
.