Why is PTFE said to be the "King of Plastics"?
Polytetrafluoroethylene (polytetrafluoroethylene, abbreviated as PTFE), commonly referred to as "non-stick coating" or "easy-to-clean material". This material has the characteristics of acid and alkali resistance and resistance to various organic solvents, and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance, and its friction coefficient is extremely low, so it can be used for lubrication, and it has also become an ideal coating for easy cleaning of the inner layer of water pipes.
On October 27, 2017, the list of carcinogens published by the World Health Organization's International Agency for Research on Cancer was preliminarily sorted for reference, and PTFE was included in the list of 3 types of carcinogens.
Others: The propagation speed of the wave in PTFE is: 207019667 .8=0.69v Note: The calculation formula of the propagation speed of the wave in the medium is . is the permittivity and is the magnetic permeability.
PTFE is known as the "King of Plastics". Roy Plankter, the father of fluororesin, began to research Freon substitutes at DuPont in the United States in 1936. They collected part of tetrafluoroethylene and stored it in steel cylinders for the second time. The next day of the experiment was carried out, but when the pressure reducing valve of the cylinder was opened the next day, there was no gas overflow. They thought it was a leak, but when the cylinder was weighed, they found that the cylinder did not lose weight. They sawed open the cylinder and found a large amount of white powder, which was Teflon.
They found that polytetrafluoroethylene has excellent properties and can be used in anti-fuse sealing gaskets for atomic bombs, artillery shells, etc., so the US military has kept the technology secret during World War II. It was not decrypted until after the end of World War II, and the industrial production of PTFE was realized in 1946.