Polymers
8.0 Teflon or PTFE (Polytetrafluoro ethylene)
8.0 Teflon or PTFE (Polytetrafluoro ethylene)
It is an addition polymer of tetrafluoroethylene.
Commercial polymerizatioin of tetrafluoroethylene is essentially aqueous polymerization accomplished by using free radical initiators (persulphate of hydrogen peroxide).
Teflon is a linear polymer with a high density and is resistant towards heat, action of chemicals such as acids and bases. It’s electrical insulation property; weather resistance and chemical resistance are excellent.
Uses: Major applications of PTFE are as seals films, gaskets, laboratory equipments or components thereof, packings in pumps and valves, stopcocks, machine components, kitchenwares (non-stick PTFE coated pans) etc., and in electrical insulation and electronics. Its high volume cost is a constraint for its use for making large objects. Outstanding weather resistant and chemical resistant polymers are also obtained from polymerization and copolymerization of chlorotrifluoroethylene, vinyl fluoride, vinylidine fluoride and hexafluoropropylene.
