PPS is a thermoplastic engineering plastic containing a phenylsulfide group in its main chain, belonging to the polyether plastics category. It was industrialized in the United States in 1968, and the main industrial production methods include solution polymerization and self-polycondensation.PPSThe molecular structure reveals that it is a linear or slightly branched high polymer composed of alternating benzene rings and sulfur atoms. The molecular chains exhibit strong integrity, with the main chain, connected by rigid benzene rings and flexible thioether chains, displaying a balance between rigidity and flexibility. Therefore,PPSCan crystallize, with high melting point; due to conjugation between the benzene ring and sulfur atom. As the sulfur atom is not saturated, oxidation can convert the thioether bond into sulfoxide, or create oxygen bridge branching or cross-linking with adjacent macromolecules, resulting in excellent thermal and oxygen stability; due to the polarity of the sulfur atom being conjugated by the benzene ring and constrained by high crystallinity, makingPPSDemonstrates non-polar or weakly polar characteristics, thus.PPSThe electrical insulation, dielectric properties, and resistance to chemical mediums are also outstanding; due toPPSExcellent compatibility with numerous polymers and additives, allowing for modification through various methods to enhance its mechanical properties and other characteristics.