Introduction to Polytetrafluoroethylene Polymer Materials

Introduction to Polytetrafluoroethylene Polymer Materials
1. Polytetrafluoroethylene
1. PTFE (C2F4) n Teflon, Teflon, Teflon, Deflon
Density: 2.1-2.3 g/cm ³; Known as the "King of Plastics", it was successfully developed by Roy Planckett, the father of fluororesin, at DuPont in the United States in 1936.
Polytetrafluoroethylene has excellent properties and can be used as an anti fusion sealing gasket for atomic bombs, artillery shells, etc. Therefore, the US military kept this technology confidential during World War II. It was not until the end of World War II that it was declassified and industrial production of polytetrafluoroethylene was achieved in 1946. Polytetrafluoroethylene is an important category of plastics. Since the synthesis of polytetrafluoroethylene, the development and application of fluoroplastics have made significant progress. At present, it has been widely applied in industries such as aviation, aerospace, atomic energy, electronics, electrical appliances, chemical engineering, machinery, construction, light textile, medicine, and is increasingly deeply embedded in people's daily lives.
2. Basic characteristics
High temperature resistance - operating temperature up to 250 ℃.
Low temperature resistance - with good mechanical toughness; Even if the temperature drops to -196 ℃, an elongation of 5% can be maintained.
Corrosion resistance - shows inertness and resistance to strong acids, alkalis, water, and various organic solvents for most chemicals and solvents.
Climate resistance - has the best aging life among plastics. But poor radiation resistance;
High lubrication - is the lowest friction coefficient among solid materials.
Non adhesion - refers to the minimum surface tension in solid materials, which does not adhere to any substance.
Non toxic - with physiological inertness, long-term implantation of artificial blood vessels and organs into the body without adverse reactions.
3. Modified polytetrafluoroethylene (also a research direction in various countries)
Inorganic filling materials: such as glass fiber, graphite, molybdenum disulfide, carbon fiber, etc;
Metal filling materials: copper, iron, lead, molybdenum, tungsten, silver, etc;