Polysulfone (PSU) plastics are polymer compounds whose macromolecular main chain contains sulfone groups and aromatic nuclei. It is a linear thermoplastic engineering plastics, with excellent heat resistance, oxidation resistance, radiation resistance, as well as electrical insulation, outstanding creep resistance and high physical and mechanical properties, excellent chemical resistance, in addition to strong solvents, sulfuric acid, nitric acid, other than the stability of other chemical reagents (such as inorganic acids and alkaline salts, etc.).
According to the different molecular structure of its main chain, polysulfone plastics can be divided into polysulfone, polyarylsulfone and polyethersulfone. Generally speaking, the heat distortion temperature of polysulfone is 175 degrees Celsius, and can be used for a long time between -100 degrees Celsius and 150 degrees Celsius, and the aging resistance is excellent at high temperatures. Polyarylsulfone is one of the best varieties of heat-resistant engineering plastics, its heat resistance can be comparable with thermosetting high-temperature-resistant sentence
Polyimide, load deflection temperature of 275 degrees Celsius, the long-term use of the temperature of 275 degrees Celsius, at -240 degrees Celsius -260 degrees Celsius can maintain good mechanical properties and electrical insulation properties. The performance of polyethersulfone between polysulfone and polyarylsulfone load temperature of 203 degrees Celsius long-term use temperature of -100 degrees Celsius-180 degrees Celsius. Polysulfone plastics are still able to maintain good electrical insulation properties in humid environments.
Their main applications are:
Mechanical industry: used in the manufacture of watch cases and parts, photocopiers and cameras and other parts, used as food machinery, hot water valves, refrigeration system appliances, transmission parts and so on. Polysulfone plastic to add
PTFE or graphite and other wear-resistant filler can be used for high-temperature load bearings, as well as piston rings, bearing cages, hot water measuring instruments, warm water pump pump body, impeller and so on.
Electronic and electrical appliances: can be used in the manufacture of television sets, audio and computer integral circuit boards, but also the production of electronic and electrical equipment shells, plating tanks, oscilloscope casing and coil frame, capacitor film and wires, cables, coating layer, a variety of small precision electronic components. Polyarylsulfone can be used as class C insulating materials, made into a variety of high-temperature coil frames, switches, connectors and so on. Polyethersulfone can also be used as coil tubing, coil frames, miniature capacitors and so on. Glass fiber reinforced polyethersulfone as silicon insulator, micro-potentiometer shell and integrated circuit socket.
Transportation: used in the manufacture of automotive instrument panels, speed splitter cover, guard plate, ball bearing cages, engine gears, thrust rings, etc.; aircraft hot air ducts and frame windows.
Medical devices: because of its transparency and heat resistance to water, steam, ethanol and hygienic characteristics, can be used to make gas masks, contact with the eye piece of the sterilizer, endoscope parts, artificial heart valves, artificial dentures, etc.; polyethersulfone can be made into artificial respirator, blood pressure check
tube, dental reflector stents, syringes and so on. Polysulfone and polyethersulfone can also be made over the filter membrane and reverse osmosis membrane, etc.
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