What is polyphenylene sulfide? We have to start with polyarylsulfide (PAS). Poly (aryl sulfide) refers to a class of macromolecular polymers with sulfur and aryl groups alternately connected in the main chain structure, such as polyphenylene sulfide sulfone (PPSSU), polyphenylene sulfide ketone (PPSK), etc. Because the molecular chain of these polymers contains sulfur and aryl structure, they have excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, dimensional stability and excellent electrical properties. Among polyarylsulfide polymers, polyphenylene sulfide (PPS) is the most typical, important and common representative. The full name of polyphenylene sulfide is polyphenylene sulfide, which is also called PPS in English. It can be divided into coating grade, injection grade, fiber grade, extrusion grade/film grade according to the difference in the number of practical molecular weights. The molecular main chain of polyphenylene sulfide is formed by alternating arrangement of benzene ring and sulfur atom. The benzene ring structure endows polyphenylene sulfide with rigidity, and the sulfide bond provides a certain degree of flexibility. Combined with the excellent properties of polyarylene sulfide polymers, polyphenylene sulfide is widely used in the fields of electronics, machinery, aerospace, chemical industry, etc. Chemical formula of polyphenylene sulfide | The picture comes from the network polyphenylene sulfide. It has excellent comprehensive properties, but it also has the disadvantages of high brittleness, poor toughness and low strength. Therefore, it usually needs to be used with other materials to improve the performance. The most common is to add glass fiber and carbon fiber. Glass fiber plays the role of nucleating agent in polyphenylene sulfide matrix, making polyphenylene sulfide molecules crystallize around the glass fiber, and then adding coupling agent to improve the bonding between the two interfaces. When the composite is impacted by the outside, it can play a reinforcing role. Carbon fiber has the advantages of light weight, high strength and modulus, conductivity and heat conduction, small expansion coefficient, etc. It is often used in the aerospace field with polyphenylene sulfide composite processing. This composite is also considered to be one of the aviation thermoplastic composites with the best comprehensive performance and the most potential.

In addition, there are composites formed by blending polyphenylene sulfide and polytetrafluoroethylene. The molecular structure of polytetrafluoroethylene contains carbon fluorine bonds with high bond energy, and the shielding effect formed by fluorine atoms outside the carbon chain makes it have excellent self lubrication, electrical insulation, chemical stability, high and low temperature resistance, aging resistance and other advantages. Combining with polyphenylene sulfide can not only give play to their advantages, but also improve the poor toughness, low mechanical strength and low wear resistance of polyphenylene sulfide. The combination of the two can be described as a "match made in heaven". As a new type of polymer material indispensable for the development of high-tech industries and the upgrading of traditional industries, non stick pans are ready for development in China's polyphenylene sulfide market. However, the supply of materials is often in short supply. The sources of PPS in China mainly depend on the United States, Japan, Europe and other countries, and the products are mainly glass fiber reinforced, filled, toughened and other modified PPS granules. What is PPS modified aggregate? PPS is made by modifying and granulating the raw powder of polyphenylene sulfide resin. For example, the above-mentioned composite materials with glass fiber and carbon fiber are modified PPS.