A fluoropolymer is a fluorocarbon-based polymer with multiple carbon–fluorine bonds. It is characterized by a high resistance to solvents, acids, and bases. The best known fluoropolymer is polytetrafluoroethylene. The trade mark Teflon was coined by the DuPont Company in 1946.
In 1938, polytetrafluoroethylene (DuPont brand name Teflon) was discovered by accident by a recently hired DuPont Ph.D., Roy J. Plunkett. While working with tetrafluoroethylene gas to develop refrigerants, he noticed that a previously-pressurized cylinder had no pressure remaining. In dissecting the cylinder, he found a mass of white solid in a quantity similar to that of the tetrafluoroethylene gas. It was determined that this material was a new-to-the-world polymer. Tests showed the substance was resistant to corrosion from most acids, bases and solvents and had better high temperature stability than any other plastic. By early 1941, a crash program was making substantial quantities of PTFE for the Manhattan Project.
Fluoropolymers share the properties of fluorocarbons in that they are not as susceptible to the van der Waals force as hydrocarbons. This contributes to their non-stick and friction reducing properties. Also, they are stable due to the stability multiple carbon–fluorine bonds add to a chemical compound. Fluoropolymers may be mechanically characterized as thermosets or thermoplastics. Fluoropolymers can be homopolymers or Copolymer.
Examples of monomers used to prepare fluoropolymers
- Perfluorocycloalkene (PFCA)
- Ethylene (Ethane) (E)
- Vinyl fluoride (fluoroethylene) (VF1)
- Vinylidene fluoride (1,1-difluoroethylene) (VDF or VF2)
- Tetrafluoroethylene (TFE)
- Chlorotrifluoroethylene (CTFE)
- Propylene (P)
- Hexafluoropropylene (HFP)
- Perfluoropropylvinylether (PPVE)
- Perfluoromethylvinylether (PMVE)
Current market and forecast
The global demand on fluoropolymers was estimated at approximately US$7.25 billion in 2011. Driven by new developments of products, applications, and processes, as well as strong demands in new markets, the demand is expected to grow by 5.8% in the following years.
Some of the world's largest manufacturers of fluoropolymers include DuPont, 3M, Solvay Chemicals, BASF and Dyneon.
Examples of fluoropolymers
|Fluoropolymer||Trade names||Monomers||Melting point (°C)|
|PVDF (polyvinylidene fluoride)||Kynar Solef Hylar||VF2||175|
|PTFE (polytetrafluoroethylene)||Sold by AGC under the tradename Fluon PTFE; Sold by Dupont and Chemours Company under the tradename Teflon; sold by Solvay Specialty Polymers under the tradenames Algoflon Hyflon and Polymist; sold by Daikin under the tradename Polyflon||TFE||327|
|PCTFE (polychlorotrifluoroethylene)||Kel-F (3M), Neoflon (Daikin)||CTFE||220|
|PFA, MFA  (perfluoroalkoxy polymer)||Sold by AGC under the tradename Fluon PFA. Sold by DuPont under the tradename Teflon. Sold by Solvay Specialty Polymers under the tradename Hyflon. Neoflon (Daikin)||PPVE + TFE||305|
|FEP (fluorinated ethylene-propylene)||Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon (Daikin) and Hyflon||HFP + TFE||260|
|ETFE (polyethylenetetrafluoroethylene)||Sold by AGC under the trade name of FluonETFE Tefzel,; sold by Daikin under the tradename Neoflon||TFE + E||265|
|ECTFE (polyethylenechlorotrifluoroethylene)||Halar sold by Solvay Specialty Polymers||CTFE + E|
|FFPM/FFKM (Perfluorinated Elastomer [Perfluoroelastomer])||Kalrez. Tecnoflon PFR DAI-EL (Daikin)|
|FPM/FKM (Fluoroelastomer [Vinylidene Fluoride based copolymers])||Viton, Tecnoflon FKM, DAI-EL (Daikin), Fluonox (Gujarat Fluorochemicals Limited)|
|FEPM (Fluoroelastomer [Tetrafluoroethylene-Propylene])||Sold by AGC under the trade name of AFLAS,||TFE + P|
|PFPE (Perfluoropolyether)||Sold by DuPont under the tradename Krytox. Sold by Solvay Specialty Polymers S.p.A. as Fomblin and Galden|
|PFSA (Perfluorosulfonic acid)||Nafion|
|HDT, @ 66 PSI||D648||°F||250||158||164||219||240||248||300|
|HDT, @ 264 PSI||D648||°F||122||129||118||160||169||-||239|
|Limiting oxygen index||D2863||%||>95||>95||>95||30-36|
|Dielectric constant||D150||1 MHz||2.1||2.1||2.1||2.6|
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- Tedlar is a registered trademark of DuPont
- Christopher C. Ibeh (2011). THERMOPLASTIC MATERIALS Properties, Manufacturing Methods, and Applications. CRC Press. pp. 491–497. ISBN 978-1-4200-9383-4.
- Kynar is a registered trademark of Arkema, Inc.
- Solef is a registered trademark of Solvay specialty polymers S.p.A.
- Hylar is a registered trademark of Solvay specialty polymers S.p.A.
- "Typical Properties of Fluropolymers". Fluoropolymer. Archived from the original on 2014-04-13. Retrieved 2014-04-09.
- Hyflon is a registered trademark of Solvay Solexis S.p.A.
- Fluon is a registered trademark of Asahi Glass Company
- Tefzel is a registered trademark of DuPont
- Halar is a registered trademark of Solvay Solexis S.p.A.
- Kalrez is a registered trademark of DuPont
- Tecnoflon is a registered trademark of Solvay Solexis S.p.A.
- Viton is a registered trademark of DuPont
- AFLAS is a registered trademark of AGC(Asahi Glass Co, Ltd.)
- Krytox is a registered trademark of DuPont
- "Typical Properties of Fluoropolymers". Fluorotherm. Archived from the original on 2014-04-13. Retrieved 2014-04-09.