In a process for producing poly (p-phenylenesulfide) from an alkali metal sulfide and a p-dihalobenzene, a product polymer of an advantageously increased molecular weight is obtained by: providing a mixture comprising an alkali metal sulfide, a polar aprotic solvent and a carboxylic acid sodium salt represented by the general formula: ZCOONa (wherein Z is a C₆ - C₂₀ aromatic hydrocarbon group or a substituted or unsabstituted pyridyl group
where substituents R, which may be the same or different, represent each a C₁ - C₂₀ organic radical and n is an integer of from 0 to 4), the content of water present in said mixture apart from any water of hydration or crystallization which may be contained in said alkali metal sulfide and carboxylic acid sodium salt being at least 5 moles per mole of said alkali metal sulfide present; thermally dehydrating said alkali metal sulfide in said mixture by removing at least part of the water from said mixture; and then contacting the resulting dehydrated mixture with a p-dihalobenzene so as to produce the intended polymer.
在一种利用碱
金属
硫化物和对二卤代苯生产聚(对苯基
硫醚)的工艺中,可通过以下方法获得分子量显著增加的聚合物产品:提供一种混合物,该混合物包括碱
金属
硫化物、极性
壬烷溶剂和通式为 ZCOONa 的
羧酸钠盐(其中 Z 为 C₆ - C₂₀
芳烃基团或取代或未取代的
吡啶基):ZCOONa (其中 Z 是 C₆ - C₂₀
芳烃基团或取代或未取代的
吡啶基团)
其中,取代基 R(可以相同或不同)各代表一个 C₁ - C₂₀ 有机基,n 为 0 至 4 的整数),除了可能包含在所述碱
金属
硫化物和
羧酸钠盐中的任何
水合或结晶
水之外,存在于所述混合物中的
水的含量为每摩尔存在的所述碱
金属
硫化物至少 5 摩尔;通过从所述混合物中除去至少部分
水分,对所述混合物中的所述碱
金属
硫化物进行热脱
水;然后将得到的脱
水混合物与对二卤代苯接触,以生产所需的聚合物。