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. Because the main chain of polysulfone is benzene ring, through ether, sulfone Isopropyl equal base "hinge "It is connected, so it has the rigidity, heat resistance and flexibility of polysulfone. PSF is also a transparent and 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 use temperature is 160 ℃, and the short-term use temperature is 190 ℃, which can maintain good performance in the range of -100 ℃ - +150 ℃. PSF has excellent mechanical properties Yes, the tensile strength is MPa, the bending modulus is 2680mpa, and it has outstanding long-term creep resistance. The 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 at 145 ℃ steam. At the same time, it maintains good electrical properties in a wide temperature and frequency range, 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 tolerance. Except for concentrated nitric acid and concentrated sulfuric acid, it is stable to other acids, bases, alcohols, aliphatic hydrocarbons and other chemicals

in industry, PSF is prepared by reacting Chlorobenzene with chlorosulfonic acid to produce p-chlorobenzene sulfonyl chloride, and then condensing with chlorobenzene to synthesize 4,4 '- dichlorodiphenylsulfone under the catalysis of aluminum chloride. Then it is polycondensated with bisphenol a sodium salt formed by the reaction of bisphenol A and sodium hydroxide in the presence of dimethyl sulfoxide and other solvents to form psf

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 consumption of sulfone resin in the United States was nearly 1330 tons, most of which were PSF. The annual demand growth rate was. 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 250 tons, avoiding larger problems. Its purpose distribution was electronics and electricity, accounting for 46, automobile and aviation, accounting for 28, medical equipment, industry, and others, accounting for 10. The annual consumption growth rate of PSF in Western Europe is, and by 2000, the demand can reach nearly 4000 tons; The consumption of PSF in Japan in 1997 was 950 tons, 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 demand of the domestic market, which needs to be made up by imports; In addition, there is also a big gap in the quality of products compared with foreign countries. Domestic application development in food, health, medical and other fields is only in the initial stage, and modified alloy products need to be further developed. Therefore, the development of polysulfone products will be promising and have broad prospects for development and utilization