Tianjin Tiansu Binhai Fluorine Plastic Film

Date:2021/7/19 8:38:20 /Read: /Source:本站

Tianjin Tiansu Binhai Fluorine Plastic Film http://www.tjtsjt.net//

Mechanical properties Its friction coefficient is extremely small, only 1/5 of polyethylene, which is an important feature of perfluorocarbon surface. In addition, because the fluorine-carbon chain intermolecular forces are extremely low, PTFE is non-sticky. http://www.tjtsjt.net//

Polytetrafluoroethylene maintains excellent mechanical properties in a wide temperature range of -196~260℃. One of the characteristics of perfluorocarbon polymers is that they are not brittle at low temperatures. http://www.tjtsjt.net//

  Chemical resistance and weather resistance Except for molten alkali metals, PTFE is hardly corroded by any chemical agents. For example, in concentrated sulfuric acid, nitric acid, hydrochloric acid, even boiled in aqua regia, its weight and performance have no change, and it is almost insoluble in all solvents, only slightly soluble in all alkanes (about 0.1g/100g) above 300°C. PTFE does not absorb moisture, is non-flammable, and is extremely stable to oxygen and ultraviolet rays, so it has excellent weather resistance. http://www.tjtsjt.net//

  Electrical properties Polytetrafluoroethylene has low dielectric constant and dielectric loss in a wide frequency range, and has high breakdown voltage, volume resistivity and arc resistance. http://www.tjtsjt.net//

  Radiation resistance The radiation resistance of PTFE is poor (104 rad), and it will degrade after being exposed to high-energy radiation, and the electrical and mechanical properties of the polymer will be significantly reduced. http://www.tjtsjt.net//

  Polymerized polytetrafluoroethylene is produced by radical polymerization of tetrafluoroethylene. Industrial polymerization is carried out under stirring in the presence of a large amount of water to disperse the heat of reaction and facilitate temperature control. The polymerization is generally carried out at 40~80℃ and 3~26 kgf/cm2 pressure. Inorganic persulfate and organic peroxide can be used as initiators, or a redox initiation system can be used. 171.38kJ of heat is released during polymerization of tetrafluoroethylene per mole. Dispersion polymerization must add perfluorinated surfactants, such as perfluorooctanoic acid or its salts. http://www.tjtsjt.net//

                         Taken from the Internet http://www.tjtsjt.net//

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