What type of polymerization is tetrafluoroethylene?
free radical vinyl polymerization
PTFE is a vinyl polymer, and its structure, if not its behavior, is similar to polyethylene. Polytetrafluoroethylene is made from the monomer tetrafluoroethylene by free radical vinyl polymerization.
How is tetrafluoroethylene polymerized?
The monomer is transformed into the polymer poly(tetrafluoroethene) (PTFE), by radical polymerization. The reaction is carried out by passing TFE into water containing a radical initiator, e.g. ammonium persulfate, (NH4)2S2O8, at 310-350 K and a pressure of 10-20 atm. About a third of the PTFE is produced in this form.
How is tetrafluoroethylene formed?
Tetrafluoroethylene is produced by heating chlorodifluoromethane, which is made from chloroform by its reaction with hydrogen fluoride in the presence of antimony pentachloride; chlorodifluoromethane (known by several trade names, of which the oldest is Freon 22) is used as a refrigerant in small air conditioners.
What is the structure of tetrafluoroethylene?
C2F4
Tetrafluoroethylene/Formula
What commonly encountered polymer is produced by the polymerization of tetrafluoroethylene?
polytetrafluoroethylene (PTFE)
polytetrafluoroethylene (PTFE), a strong, tough, waxy, nonflammable synthetic resin produced by the polymerization of tetrafluoroethylene.
What are the properties of tetrafluoroethylene?
Tetrafluoroethylene (TFE) is a fluorocarbon with the chemical formula C2F4. It is the simplest perfluorinated alkene….Tetrafluoroethylene.
| Names | |
|---|---|
| Odor | Odorless |
| Density | 1.519 g/cm3 at -76 °C |
| Melting point | −142.5 °C (−224.5 °F; 130.7 K) |
| Boiling point | −76.3 °C (−105.3 °F; 196.8 K) |
What category of chemical does tetrafluoroethylene belong to according to US Department of Transportation DOT regulations?
* Tetrafluoroethylene is on the Hazardous Substance List because it is cited by ACGIH, DOT, NTP, DEP, IARC, NFPA and EPA. * This chemical is on the Special Health Hazard Substance List because it is a CARCINOGEN and is FLAMMABLE and REACTIVE.
What is the first step in addition polymerization?
There are three steps in this type of polymerization: initiation, propagation, and termination. During initiation, the monomer acquires an active site to become a free radical. The addition of initiators or other approaches such as absorption of heat, light or irradiation can trigger the initiation process.
What is co polymerization give one example?
A copolymer is a polymer that is made up of two or more monomer species. Many commercially important polymers are copolymers. Examples include polyethylene-vinyl acetate (PEVA), nitrile rubber, and acrylonitrile butadiene styrene (ABS).
What is the difference between TFE and PTFE?
PTFE is the chemical description for polytetrafluoroethylene, or better known as DuPont’s Teflon. Many other suppliers also manufacture PTFE grannular and free flow resins. TFE is the chemical name for tetrafluoroethylene, which is a colorless and taseless gas, extremely toxic and ultimately deadly.
Is tetrafluoroethylene a Teflon?
Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications….Polytetrafluoroethylene.
| Names | |
|---|---|
| Other names Fluon, Poly(tetrafluroethene), Poly(difluoromethylene), Poly(tetrafluoroethylene), teflon | |
| Identifiers | |
| CAS Number | 9002-84-0 |
| Abbreviations | PTFE |