PPS, short for polyparaphenylene sulfide, is a thermoplastic resin and, along with PEEK, PSF, PI, PAR, and LCP, is one of the six major specialty engineering plastics.PPS is one of the engineering plastics with excellent heat resistance, featuring a heat deflection temperature generally above 260 degrees, chemical resistance second only to PTFE, and flowability second only to nylon. Additionally, it boasts low shrinkage during molding (about 0.08%), low water absorption (about 0.02%), good flame retardancy, and excellent resistance to vibration fatigue.Widely used as structural polymer materials, they are extensively applied as special engineering plastics after being filled and modified. Additionally, they can be fabricated into various functional films, coatings, and composite materials, achieving successful applications in electronics, electrical appliances, aerospace, and automotive transportation fields.