Production, application and market prospect of the

Production, application and market prospect of polysulfone

polysulfone (PSF) is a kind of aromatic amorphous high-performance thermoplastic engineering plastics containing sulfone groups in the molecular backbone. There are three specifications: transparent, opaque and filled grades. Because the main chain of polysulfone is benzene ring, which is connected by ether, alum, isopropyl and other groups "hinged sulfone", it has both the rigidity and heat resistance of polysulfone and the flexibility of polysulfone. PS researchers constructed a prototype of self folding printable equipment. F is a transparent, hydrolytically stable plastic with good dimensional stability and good deformation stability at room temperature; The heating deformation temperature is 175 ℃, which has outstanding thermal stability. The long-term service temperature is 160 ℃, and the short-term service temperature is 190 ℃. It can maintain good performance in the range of 100 ℃ ~ ＋ 150 ℃. PSF has excellent mechanical properties, tensile strength of 70 ~ 75mpa, bending modulus of 2680mpa, and outstanding long-term creep resistance. Its mechanical properties can remain unchanged during long-term use. PSF also has excellent dielectric properties, which can maintain high dielectric properties even when placed in water or at 190 ℃. During long-term thermal aging at 150 ℃, its physical and electrical properties change little, and its steam resistance is excellent. Its service life is at least 12 years under 145 ℃ steam. At the same time, it maintains good electrical properties in a wide range of temperature and frequency, and its flame resistance meets more stringent safety requirements, It is the best variety of plastics in terms of radiation resistance. PSF is easy to process and shape, and can reach precise tolerances. Except for concentrated nitric acid and concentrated sulfuric acid, it is stable to its acids, bases, alcohols, aliphatic hydrocarbons and other chemicals. In industry, high-performance thermoelectric and power-saving materials and technologies, such as PSF, are prepared by reacting Chlorobenzene with chlorosulfonic acid to produce p-chlorobenzene sulfonyl chloride, then shrinking with chlorobenzene under the catalysis of aluminum chloride to synthesize 4,4 ` - dichlorodiphenylsulfone, and then reacting with bisphenol a sodium salt produced by bisphenol A and sodium hydroxide in the presence of dimethyl alum and other solvents to polycondensate into PSF. PSF is widely used. In the electronic and electrical field, PSF can be used to make all kinds of electrical parts such as contactors, connectors, transformer insulating parts, thyristor caps, insulating sleeves, coil frames, terminals and collector rings, printed circuit boards, bushings, covers, TV system parts, capacitor films, brush holders, alkaline battery boxes, etc. in the automotive and aviation fields, PSF can be used to make protective cover components, electric gears, battery covers, detonators Sub ignition device components, lamp components, aircraft internal accessories and aircraft external parts, spacecraft external protective cover, etc. PSF can also be used to make illuminator baffle, electric transmission device, sensor, etc. The demand for polysulfone polymers used to make engine room components in the world market continues to grow, mainly because this kind of polymer releases less heat, produces less smoke and spreads less toxic gases when burning, which fully meets the use requirements of safety regulations. In the kitchen supplies market, PSF can replace glass and stainless steel products in the manufacture of steam dinner plates, coffee containers, microwave cookers, containers for milk and agricultural products, egg cookers and milker components, beverages and food dispensers. PSF is a non-toxic product accounting for 6% of the total export volume of extruders in China, which can be made into utensils that repeatedly contact with food. As a transparent new material, PSF has better resistance to hot water and hydrolysis stability than any other thermoplastic, so it can be used to make coffee pots, etc. The connecting pipe made of PSF is used for glass fiber or glass fiber reinforced polyester masonry. The outer layer of the pipe has high strength, and the inner layer of the pipe is resistant to chemicals. It is lighter than steel pipe and transparent, which is convenient for temporary control. It is often used in the food industry and making lamps of strong light lamps. In terms of health and medical devices, PSF can be used to make surgical discs, spray, humidifiers, contact lens fixtures, flow controllers, instrument covers, dental instruments, liquid containers, pacemakers, respirators and laboratory instruments. PSF is used to make various therapeutic products, which is less expensive than glass products and is not easy to crack, so it can be used for instrument shell, dental instruments, heart valve box, knife. If you want to know more about experimental machine knowledge film cleaning system, soft contact lens forming box, micro filter, dialysis film, etc., PSF can also be used for dental inlay, and its bonding strength is twice that of acrylic acid. In terms of daily necessities, PSF can be used to make heat-resistant and hydrolysis resistant products such as humidifiers, hair dryers, clothing steamers, camera boxes, projector components, etc. PSF pellets irradiated by 0.4-1.6mgy and well dried are easy to be injection molded at 310 ℃ and 170 ℃ mold temperature. They are suitable for adhesives of laminated materials. Polysulfone with silane, such as PSF ~ Sr and pkxr, can be used as adhesives for sizing glass fiber and graphite fiber to make composites. PSF with silyl reinforced with graphite fabric can be used as elevator and other aircraft components. PSF can increase wear resistance and physical and mechanical properties after adding solid lubricant polytetrafluoroethylene. It is also used to prepare wear-resistant coatings. In addition, PSF also manufactures various chemical processing equipment (such as pump cover, protective layer outside the tower, etc.), food processing equipment, pollution control equipment, dairy processing equipment and engineering, construction, chemical pipelines, etc. At present, PSF is mainly used in electronic and electrical aspects. The development of electronics and electricity towards small size, light weight and high temperature resistance has promoted the growth of PSF consumption. The demand for PSF in automotive, aerospace, medical and health care is still maintaining a steady growth momentum. In 1997, the United States consumed nearly 1330 tons of sulfone resin, most of which were PSF, with a demand growth rate of%, and its consumption distribution was electronics and electricity accounting for 35%, food and daily necessities accounting for 25%, automobiles, aviation, etc. accounting for 15%, medical treatment accounting for 12%, industry accounting for 4%, and others accounting for 9%. In 1997, the consumption of PSF in Western Europe was 2500 tons. Its purpose distribution was electronics and electricity, accounting for 46%, automobiles and aviation, 28%, medical equipment, 10%, industry, 10% and others, 6%. The annual consumption growth rate of FSF in Western Europe is 14-17%. By 2000, the demand will reach nearly 4000 tons. The consumption of PSF in Japan was 950 tons in 1991, with an average annual growth rate of, and the demand will reach about 1200 tons by 2000. In the field of optical applications in Japan, PSF has replaced PMMA and PC in lens production. These optical sensors can be used in automatic controllers and have formed a market scale. In addition, 100 tons of PSF resin are also consumed in the application of fuse box. At present, the production capacity of PSF in China is less than 700 tons/year, and the output is about 400 tons/year. The manufacturers mainly include Shanghai Shuguang Chemical Plant (300 tons/year), Dalian No.1 plastic plant (200 tons/year) and Jilin University (200 tons/year). Most of them are in pilot production scale, and the output is difficult to meet the needs of the domestic market, which needs to be made up by imports. In addition, the quality of products also lags far behind that of foreign countries. The domestic application and development work in the fields of food, health, medical treatment and so on is only in the initial stage, and the modified alloy products need to be further developed