The chemical properties PTFE has excellent stability. B […]
The chemical properties PTFE has excellent stability. Because keys can be very high, not easily broken, even up to degree Celsius temperature, it will not damage it. In addition, the electronegativity of the fluorine atom, surrounded by shielding in the main chain of the main chain, makes other reactive atoms almost impossible to drill. Thus, PTFE can resist strong oxidizing and corrosive media. It is resistant to sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, sodium hydroxide, hydrogen peroxide, chlorine corrosion as boiling and aqua regia. Resistance to organic solvents such as alcohols, aldehydes, and ketones to corrosion. Excellent weatherability and resistance to oxygen and ultraviolet radiation. Therefore, it has a "plastics King". However, resistance to molten alkali metals such as lithium, sodium, potassium, fluorine and its compounds, perfluorinated alkanes, such as chlorine and fluorine alkane corrosion. PTFE surface properties of non-polar molecules and Intermolecular forces is small, and low surface energy. Its smooth surface, adhesion is poor, almost all solid materials will not bond; only the surface energy and similar liquids (such as hexane, ether, petroleum ether) wetting its surface. Therefore, it is difficult to adhere to other material, unless a special surface treatment.