硫化钠法常压合成聚苯硫醚的研究

Study on Synthesis of Poly (Phenylene Sulfide) at Atmospheric Pressure

聚苯硫醚 (PPS)是一种新型的高分子工程塑料。概要介绍了PPS的特性及应用实例。在催化剂Na2 CO3 的作用下 ,用对二氯苯 (P -DCB)和脱水后的硫化钠在N -甲基吡咯烷酮 (NMP)溶剂中常压合成聚苯硫醚。实验中主要研究了温度、原料配比和反应时间对该缩聚反应的影响。实验结果表明 :反应最佳温度为 2 0 2± 3℃ ,最佳原料配比为 1∶1.1(Na2 S∶P -DCB) ,最佳反应时间为 8h。

Polyphenylene sulfide (PPS) is a new type of engineering plastics with high molecular weight.The characteristics and appplied examples of PPS engineering plastics are summarily presented.At atmospheric pressure,in the presence of catalyst,PPS can be synthesized by p-dichlorobenzene and sodium sulfide (already desiccated) in the N-methylpyrrolidone.The affection of reaction temperature and material proportion and reaction time have been studied in the experiments.The results show that the best temperature is 202±3℃, the best material proportion is 1∶1.1(Na 2S∶P-DCB),and the best reaction time is 8 hous.