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聚苯硫醚,简称PPS,分子量1.8万左右(n约170),是一种新型的工程塑料,有线型热固性及支链热塑性两种结构,具有耐热、耐化学腐蚀、阻燃、难溶的特性。其耐热性优于聚碳酸酯、聚苯醚、聚砜,而与聚醚砜不相上下。它在345℃以上温度在空气中固化后,可在315℃长期使用,蠕变性等于零。其耐腐蚀性仅次于聚四氟乙烯。在175℃以下不溶于所有溶剂,250～300℃不溶于烃、酮、醇等大部分溶剂。除强氧化性酸外,极耐酸碱,甚至沸腾的盐酸和氢氧化钠也不起作用。PPS可加工成模塑料、玻璃纤维增强层压材料和模塑制品、粉末涂料、粘合剂、H级绝缘漆,可作电
Polyphenylene sulfide, abbreviated as PPS, has a molecular weight of about 18,000 (n is about 170). It is a new type of engineering plastics. It has two types of structures, ie, thermosetting and branched thermoplastics, which are heat-resistant, chemically resistant, flame-retardant, and hardly soluble. The characteristics. Its heat resistance is better than polycarbonate, polyphenylene oxide, polysulfone, and polyether sulfone. It cures in air at temperatures above 345°C and can be used at 315°C for long periods of time. Creep is equal to zero. Its corrosion resistance is second only to PTFE. Below 175 °C insoluble in all solvents, 250 ~ 300 °C insoluble in most solvents such as hydrocarbons, ketones, alcohols. In addition to strong oxidizing acids, extremely acid and alkali, even boiling hydrochloric acid and sodium hydroxide do not work. PPS can be processed into molding plastics, glass fiber reinforced laminates and molded products, powder coatings, adhesives, Class H insulating paints, and can be used as electricity.