Polytetrafluoroethylene(PTFE) Usage And Synthesis
June 16, 2022
Polytetrafluoroethylene (PTFE) is commonly known as the king of plastics. It is a polymer compound formed by addition polymerization of tetrafluoroethylene. There are three kinds of granular, powder and dispersion. The density of the solid is 2.25g/cm3. White color, translucent, good heat resistance. The operating temperature can be between -75°C and 250°C. When heated to 415 ℃, it can be decomposed and the generated gas is harmful to human beings. It does not react with all chemicals except molten metal sodium and liquid fluorine. In chemical production, it is used as equipment lining, fractionation tower, bellows, pumps, valves, gaskets, etc.; in the machinery industry, it is used as seals, piston rings, rotating bearings, etc.; Wire insulation, cable Chemicalbook insulation, high-frequency electronic instrument insulation and the manufacture of high-frequency cables, high-precision capacitors, wires, etc.; in the construction industry, used to make large pipes, steel structure roof trusses, bridges, etc.; in the textile industry, it can be used for anti-sticking Rollers, conveyor belts impregnated with PTFE, etc.; in the pharmaceutical industry, used as artificial blood vessels, artificial heart-lung devices, disinfection protectors, etc.; in the plastics and food industries, as a release agent. In 1935, when R.J. Plaquette was studying the refrigerant of halothane, he found that when the container was filled with tetrafluoroethylene, a white solid appeared on the wall of the container, which was the first discovery of polytetrafluoroethylene. In 1941, the DuPont Company of the United States conducted a pilot test, and industrial production began in 1950.
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