Polyphenylene sulfide, the full name of polyphenylene sulfide, is a thermoplastic resin with phenylthio groups in the main chain of the molecule. The English name is polyphenylene snlfide (PPS for short).
PPS is a crystalline (crystallinity 55-65) highly rigid white powder polymer with high heat resistance (continuous use temperature up to 240°C), mechanical strength, rigidity, flame retardancy, and chemical resistance. A resin with excellent pharmaceutical properties, electrical properties, and dimensional stability, as well as excellent wear resistance, creep resistance, and flame retardancy. Self-extinguishing. It reaches UL94V-0 level and still maintains good electrical properties under high temperature and high humidity. It has good fluidity and is easy to form. There are almost no shrinkage cavities during molding. It has good affinity with various inorganic fillers. After reinforcement modification, its physical and mechanical properties and heat resistance (thermal deformation temperature) can be improved. Reinforcement materials include glass fiber, carbon fiber, polyaramid fiber, metal fiber, etc., with glass fiber being the main one. Inorganic fillers include talc, kaolin, calcium carbonate, silica, molybdenum disulfide, etc.
PPS/PTFE, PPS/PA, PPS/PPO and other alloys have been commercialized. The PPS/PTFE alloy improves the brittleness, lubricity and corrosion resistance of PPS. The PPS/PA alloy is a high-toughness alloy.
Glass fiber reinforced PPS has excellent thermal stability, wear resistance, creep resistance, excellent mechanical and electrical properties in a wide range (temperature, humidity, frequency), dielectric Small quantity and low dielectric loss. As a high-temperature resistant and anti-corrosion coating, the coating can be used for a long time at 180°C; in the electronic and electrical industry, it is used as connectors, insulating partitions, terminals, and switches; in machinery and adhesive machinery, it is used in pumps, gears, piston ring storage tanks, and blades Valve parts, watch parts, camera parts; carburetors in the automobile industry. Distributor components, electronic and electrical components, gas valves, sensor components; home appliance components include tape recorder structural components, body diodes, and various parts; the other is also used in the aerospace and aviation industries. PPS/PTFE can Make anti-stick, wear-resistant parts and transmission parts, such as shaft pumps. PSF is mainly used in electronic and electrical, food and daily necessities, automotive, aviation, medical and general industry sectors to produce various contactors, connectors, transformer insulation parts, thyristor caps, insulating sleeves, coil bobbins, and terminal posts. , printed circuit boards, bushings, covers, TV system parts, capacitor films, brush holders, alkaline battery boxes, wire and cable coatings. PSF can also be used as protective cover components, electric gears, battery covers, aircraft internal and external parts, spacecraft external protective covers, camera baffles, lighting components, and sensors. Replace glass and stainless steel to make steam dishes, coffee containers, microwave cookers, milk containers, milking machine parts, beverage and food dispensers. In terms of health and medical equipment, there are surgical trays, sprayers, humidifiers, dental equipment, flow controllers, groovers and laboratory equipment. They can also be used for dental implants, with high bonding strength, and can also be used for chemical equipment (pump covers, towers Outer protective layer, acid-resistant nozzles, pipes, valves and containers), food processing equipment, dairy processing equipment, environmental protection and infection control equipment.
Applications in the electrical and electronics industry mainly include coil bobbins, contactors, printed circuit boards with two-dimensional and three-dimensional spatial structures, switch parts, lamp stand bases, batteries and battery covers, and capacitor thin molds wait. Since PES products have a long-term use temperature of 180°C and are UL94V-0 grade materials, they have high dimensional stability and good electrical insulation properties, making them the first choice for electrical engineering structural materials. For applications in the machinery industry, glass fiber reinforced grades are mainly used, and the parts have characteristics such as creep resistance, hardness, and dimensional stability. Suitable for making bearing brackets and shells of mechanical parts, etc. For applications in the aviation field, it has passed Federal Aviation Regulation Clause 25·853 and Passenger Aircraft Technical Standard Clause 1000·001, and is used for aircraft interior decoration parts including brackets, doors, windows, etc. to improve safety. Polyethersulfone has excellent transmittance to radar rays, and has been used in radar radomes to replace epoxy parts in the past. Applications of kitchen appliances, including coffee makers, egg cookers, microwaves, hot water pumps, etc.
The development of polyethersulfone is mainly based on polymer modification, with the purpose of improving its comprehensive performance and processing performance to meet market demand. Bu Nemen Company has developed polyethersulfone/polysulfone polymers with different component percentages and different resin properties. This polymer has a higher heat distortion temperature than polysulfone, lower water absorption than polyethersulfone, better flow processing properties, and can be reinforced with GF.