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以实验室自制的硫化锂与对二氯苯为原料,无需添加其他任何催化剂,在N-甲基吡咯烷酮中直接进行缩聚反应,合成了聚苯硫醚树脂。研究了聚合体系中含水量和单体的配比对聚合反应的影响,通过高温灼烧测定了树脂的灰分,并与传统硫化钠法合成出来的聚苯硫醚树脂的灰分进行了比较分析。采用红外和元素分析对合成产品进行了表征。用TG和DTA对树脂的熔点Tm和初始热失重Td进行了测定。结果表明:合成的树脂为线性高分子聚苯硫醚树脂,具有较低的灰分和良好的热性能。
Using laboratory self-made lithium sulfide and p-dichlorobenzene as raw materials, polyphenylene sulfide resin was synthesized by directly polycondensation reaction in N-methylpyrrolidone without adding any other catalyst. The effects of water content and monomer ratio on the polymerization were investigated. The ash content of the resin was determined by high temperature calcination. The ash content of the polyphenylene sulfide resin synthesized by the traditional sodium sulfide method was also compared. The synthesized product was characterized by infrared and elemental analysis. The melting point Tm and initial weight loss Td of the resin were measured by TG and DTA. The results show that the synthesized resin is a linear polyphenylene sulfide resin with low ash content and good thermal properties.