PPSU is an amorphous thermoplastic with high transparency and high hydrolytic stability. The article can be subjected to repeated steam sterilization. The scientific name is polyphenylene sulfone resin, abbreviated as PPSU, which is a product of the PPSU (PSF) series. It is a novel thermoplastic engineering plastic, which refers to a polymer compound containing a sulfone group and an aromatic nucleus in the main chain of the molecule, and is non-crystalline. The basic nature is a slightly amber colored linear polymer. Except for strong polar solvents, concentrated nitric acid and sulfuric acid, it is stable to general acids, alkalis, salts, alcohols, aliphatic hydrocarbons, etc. Partially soluble in ester ketone `aromatic hydrocarbons, soluble in halocarbon` DM. Good rigidity and toughness, soluble in dichloromethane, dichloroethylene and aromatic hydrocarbons. Relative density 1.24, water absorption (24h) 0.22%, molding shrinkage 0.7%, melting temperature 190 ℃, glass transition temperature 150 ℃, heat distortion temperature 174 ℃, continuous use temperature -100 ℃ ~ +150 ℃, temperature resistance, resistance Thermal oxidation, excellent creep resistance, corrosion resistance of inorganic acid, alkali, salt solution, ion radiation resistance, non-toxic, good insulation and self-extinguishing, easy to shape and process. The preparation method is composed of basic resin prepared by reacting p-polyphenylene sulfide and peracetic acid. Uses of PPSU: suitable for making heat-resistant parts, insulating parts, anti-friction and wear-resistant parts, instrumentation parts and medical equipment parts, PPSU is suitable for making low-temperature working parts. PPSU is often used in the electronic and electrical industry to manufacture integrated circuit boards, coil frames, contactors, sleeves, capacitor films, and high-performance alkaline battery casings. PPSU is used in household appliances for microwave oven equipment, coffee heaters, humidifiers, hair dryers, cloth steam dryers, beverage and food dispensers, eating utensils, drinking glasses, feeding bottles, etc. It can also be used for precision structural parts such as watches, copiers, cameras, etc. instead of non-ferrous metals. PPSU has passed the relevant specifications in the fields of medicine and food in the United States, and can replace stainless steel products. Due to the characteristics of PPSU, such as steam resistance, hydrolysis resistance, non-toxicity, high temperature steam sterilization resistance, high transparency, and good dimensional stability, PPSU can be used as surgical tool trays, sprayers, pacemakers, gas masks, dental trays, etc. Since PPSU is a safe material, it does not contain endocrine disrupting chemicals (environmental hormones: bisphenol A) that are harmful to the body, and as a material with excellent heat resistance, the heat resistance temperature is as high as 207 degrees. Due to repeated high temperature boiling, steam sterilization. It has excellent drug resistance and acid and alkali resistance, and can withstand the cleaning of general liquid medicines and detergents without chemical changes. Lightweight and drop-resistant, it is the best in terms of safety, temperature resistance, hydrolysis resistance and impact resistance. But the price is relatively expensive.
