Views: 0 Author: Site Editor Publish Time: 2023-05-19 Origin: Site
PTFE is susceptible to wear by other materials due to the low intermolecular gravitational force and the low hardness of PTFE. However, the amount of wear of PTFE can be reduced to a considerable extent with the right surface roughness for the abrasive material. Weather resistance PTFE has very high chemical resistance, for example, in concentrated sulfuric acid, nitric acid, hydrochloric acid, and even boiling in aqua regia, its weight and performance are not changed, but also almost insoluble in most solvents, only slightly soluble in full alkane above 300 ℃ (about 0.1g/100g). Polytetrafluoroethylene does not absorb moisture, non-combustible, extremely stable to oxygen and ultraviolet light, so it has excellent weather resistance. It is worth noting that polytetrafluoroethylene can not withstand a very strong reducing atmosphere molten alkali metal, ammonia alkali solution (alkali metal dissolved in liquid ammonia), some fluoride (such as TFA), naphthalene sodium salt, etc. can quickly corrode polytetrafluoroethylene products electrical properties polytetrafluoroethylene in a wide range of frequency dielectric constant and dielectric loss are very low, and breakdown voltage, volume resistivity and arc resistance are high. Radiation resistance The radiation resistance of polytetrafluoroethylene is poor (104 rads), degradation caused by high-energy radiation, the electrical and mechanical properties of the polymer are significantly reduced. Polymerization Polytetrafluoroethylene is produced by the free radical polymerization of tetrafluoroethylene.