Properties and stability of polytetrafluoroethylene

1. Stable at room temperature and pressure, avoiding moisture, heat, and high temperatures without a true melting point. It slowly decomposes above 450 ℃ and directly becomes a gas. At 327 ℃, the mechanical strength suddenly disappears. Insoluble in any solvent. Apart from being able to react with molten alkali metals, it is not corroded by any substance, and even when boiled in hydrofluoric acid, aqua regia, fuming sulfuric acid, or sodium hydroxide, it does not undergo any changes.

2. White, odorless, tasteless, and non-toxic powder, commonly known as the "plastic king". It has excellent chemical stability, corrosion resistance, sealing, high lubrication, non viscosity, electrical insulation and good anti-aging endurance. High temperature resistance, with a working temperature of up to 250 ℃. Low temperature resistance, with good mechanical toughness at low temperatures, even if the temperature drops to -196 ℃, it can maintain a 5% elongation rate. Corrosion resistant, inert to most chemicals and solvents, capable of withstanding strong acids, alkalis, water, and various organic solvents. Good weather resistance and the best aging life among plastics. High lubrication is the lowest friction coefficient among solid materials. Non adhesive is the lowest surface tension among solid materials and does not adhere to any substance. Non toxic, physiologically inert, long-term implantation of artificial blood vessels and organs without adverse reactions.

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