PPS plastic (polyphenylene sulfide) is a kind of thermoplastic special engineering plastic with excellent comprehensive properties. Its outstanding characteristics are high temperature resistance, corrosion resistance and superior mechanical properties. The impact strength, heat resistance and other mechanical properties can be greatly improved by adding glass fiber or other reinforcement materials. Because of its small shrinkage (0.15 - 0.25%) and super rigidity, PPS can be used as a substitute for metal in the bolt and joint bolt of household appliances. Compared with metal, it has obvious advantages such as easy forming, low price and fast processing speed. The full name of polyphenylene sulfide is polyphenylene sulfide. 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 gives rigidity to polyphenylene sulfide, and the sulfide bond provides a certain degree of flexibility, combined with the excellent properties of polyarylene sulfide polymers.

Polyphenylene sulfide (PPS) 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.

Polyphenylene sulfide can also be blended with polytetrafluoroethylene to form composite materials. 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.