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Encyclopedia > Fluorinated ethylene propylene
Teflon is polytetrafluoroethylene (PTFE), a polymer of fluorinated ethylene.
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Teflon is polytetrafluoroethylene (PTFE), a polymer of fluorinated ethylene.

Teflon is the brand name of the polymer polytetrafluoroethylene (PTFE) discovered by Roy J. Plunkett (19101994) of DuPont in 1938 and introduced as a commercial product in 1946. It is a thermoplastic fluoropolymer. General Name, Symbol, Number fluorine, F, 9 Chemical series halogens Group, Period, Block 17, 2, p Appearance pale greenish-yellow gas Atomic mass 18. ... R-phrases R12, R67 S-phrases S2, S9, S16, S33, S46 Flash point Flammable gas Explosive limits 2. ... Polymer is a generic term used to describe a very long molecule consisting of structural units and repeating units connected by covalent chemical bonds. ... Roy J. Plunkett (June 26, 1910 - May 12, 1994) was the chemist who accidentally invented Teflon in 1938. ... -1... 1994 (MCMXCIV in Roman) was a common year starting on Saturday of the Gregorian calendar, and was designated the International year of the Family. ... This article is about the DuPont company. ... 1938 (MCMXXXVIII) was a common year starting on Saturday (link will take you to calendar). ... 1946 (MCMXLVI) was a common year starting on Tuesday. ... A thermoplastic is a material that is plastic or deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently. ... A fluoropolymer is a polymer that contains atoms of fluorine. ...


PTFE has the lowest coefficient of friction of any known solid material. It is used as a non-stick coating for pans and other cookware. PTFE is very non-reactive, and so is often used in containers and pipework for reactive chemicals. Its melting point is 327 °C, but its properties degrade over 260 °C. Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact. ...


Other polymers with similar composition are known with the Teflon name: fluorinated ethylene-propylene (FEP) and perfluoroalkoxy polymer resin (PFA). They retain the useful properties of PTFE of low friction and non-reactivity, but are more easily formable. FEP is softer than PTFE and melts at 260 °C; it's highly transparent and resistant to sunlight.


PTFE is sometimes said to be a spin-off from the US space program with more down-to-earth applications; this is an urban legend, as teflon cooking pans were commonplace before Yuri Gagarin's flight in 1961. PTFE was discovered serendipitously by Roy Plunkett of DuPont in 1938, while attempting to make a new CFC refrigerant, when the perfluorethylene polymerized in its storage container. DuPont patented it in 1941, and registered the Teflon trademark in 1944. United States may refer to: Places: United States of America SS United States, the fastest ocean liner ever built. ... Human spaceflight is space exploration with a human crew, and possibly passengers (in contrast to unmanned space missions, which are remotely-controlled or robotic space probes). ... Urban legends are a kind of folklore consisting of stories often thought to be factual by those circulating them (see rumor). ... cast-iron iron enamel stainless steel The cooking pan is a type of food preparation utensil commonly found in the kitchen which includes many more specific cooking vessels such as saucepans and frying pans (or fry pans). ... -1... 1961 (MCMLXI) was a common year starting on Sunday (link will take you to calendar). ... Roy J. Plunkett (June 26, 1910 - May 12, 1994) was the chemist who accidentally invented Teflon in 1938. ... This article is about the DuPont company. ... 1938 (MCMXXXVIII) was a common year starting on Saturday (link will take you to calendar). ... Possible meanings: Certified Financial Consultant Chelsea Football Club Child and Family Canada Chlorofluorocarbon Combined Federal Campaign haloalkane This page concerning a three-letter acronym or abbreviation is a disambiguation page—a list of articles associated with the same title. ... For the movie, see 1941 (film) 1941 (MCMXLI) was a common year starting on Wednesday (the link is to a full 1941 calendar). ... 1944 (MCMXLIV) was a leap year starting on Saturday (link will take you to calendar). ...


An early advanced use was in the Manhattan Project, as a material to coat valves and seals in the pipes holding highly-reactive uranium hexafluoride in the vast uranium enrichment plant at Oak Ridge, Tennessee, when it was known as K416. Control panels and operators for calutrons at the Y-12 Plant in Oak Ridge, Tennessee. ... Uranium hexafluoride, or UF6, is a compound used in the uranium enrichment process that produces fuel for nuclear reactors and nuclear weapons. ... General Name, Symbol, Number uranium, U, 92 Chemical series actinides Group, Period, Block n/a, 7, f Appearance silvery gray metallic; corrodes to a spalling black oxide coat in air Atomic mass 238. ... Oak Ridge is a city located in Anderson and Roane Counties in eastern Tennessee, about 25 miles west of Knoxville. ...

Teflon is also used as the trade name for a polymer with similar properties, perfluoroalkoxy polymer resin (PFA).
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Teflon is also used as the trade name for a polymer with similar properties, perfluoroalkoxy polymer resin (PFA).

It was first sold commercially in 1946 and by 1950, DuPont was producing over a million pounds (450 t) per year in Virginia. 1946 (MCMXLVI) was a common year starting on Tuesday. ... 1950 (MCML) was a common year starting on Sunday (link will take you to calendar). ... Official language(s) English Capital Richmond Largest city Virginia Beach Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 35th 110,862 km² 320 km 690 km 7. ...


Teflon has been supplemented with another DuPont product, Silverstone, a three-coat fluoropolymer system that produces a more durable finish than Teflon. Silverstone was released in 1976. A three-coat fluoropolymer system that produces a more durable finish than Teflon. ... A fluoropolymer is a polymer that contains atoms of fluorine. ... 1976 (MCMLXXVI) is a leap year starting on Thursday (link will take you to calendar). ...


Amongst many other industrial applications, PTFE is used to coat certain types of hardened, armour-piercing bullets, so as to reduce the amount of wear on the firearm's rifling. These are often mistakenly referred to as "cop-killer" bullets on account of PTFE's supposed ability to ease a bullet's passage through body armour. Any armour-piercing effect is, however, purely a function of the bullet's velocity and rigidity rather than a property of PTFE. French anti-tank round with its sabot APFSDS at point of separation of sabot. ... Certain varieties of handgun and rifle bullets are coated with a lubricant such as Teflon. ... - Bullet resistant vest (in tan) - A bullet-resistant vest (body armor) - is an article of protective clothing that works as a form of armour to minimize injury from projectiles fired from handguns, shotguns and rifles . ...


PTFE is an excellent electrical insulator with good dielectric properties. This is especially true at high radio frequencies, making it eminently suitable for use as an insulator in cables and connector assemblies and as a material for printed circuit boards. Combined with its high melting temperature this makes it the material of choice as a high performance substitute for the weaker and more meltable polyethylene that is commonly used in low-cost applications. A dielectric, or electrical insulator, is a substance that is highly resistant to the flow of electric current and has a relative permittivity greater than unity. ... Rough plot of Earths atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including radio waves. ... // Definition An Insulator is a material or object which resists the flow of electric charge. ... A cable is two or more wires bound together which may be bare, covered or insulated. ... An electrical connector is a device for joining electrical circuits together. ... Back to Electronics Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ... Polyethylene or polyethene is a thermoplastic commodity heavily used in consumer products (over 60M tons are produced worldwide every year). ...


Due to its low friction, it is used for applications where sliding action of parts is needed: bearings, bushings, gears, slide plates, etc. In these applications it performs significantly better than nylon and acetal; it is comparable with UHMWPE, although UHMWPE is more resistant to wear than Teflon. For these applications, versions of teflon with mineral oil or molybdenum disulfide embedded as additional lubricants in its matrix are being manufactured. A bearing is a component used to reduce friction in a machine. ... Bushings used in ski lifts. ... Spur gears found on a piece of farm equipment. ... Nylon represents a family of synthetic polymers, a thermoplastic material, invented in 1935 by Wallace Carothers at DuPont. ... Polyoxymethylene, also known as polytrioxane and polyformaldehyde. ... Ultra high molecular weight polyethylene (UHMWPE), also known as high modulus polyethylene (HMPE) or high performance polyethylene (HPPE), is a thermoplastic made from oil. ... Molybdenum disulfide, also called molybdenum sulfide or molybdenum(IV) sulfide, with the formula MoS2, is a black crystalline sulfide of molybdenum. ... A lubricant (colloquially, lube, although this usually refers to personal lubricants) is a substance (usually a liquid) introduced between two moving surfaces to reduce the friction and wear between them. ...


Gore-Tex is a material incorporating teflon membrane with micropores. Gore-Tex membrane, electron microphotograph Gore-Tex is a registered trademark of W.L. Gore & Associates, best known for its use in relation to waterproof/breathable fabrics. ...


Safety

Teflon is often used to coat non-stick frying pans as it has very low friction.
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Teflon is often used to coat non-stick frying pans as it has very low friction.

While Teflon itself is chemically inert and non-toxic, Teflon begins to deteriorate after the temperature of cookware reaches about 500 °F (260 °C), and begins to significantly decompose above 660 °F (350 °C). These degredation products can be lethal to small birds, and can cause flu-like symptoms in humans. By comparison, cooking fats, oils and butter will begin to scorch and smoke at about 392 °F (200 °C), and meat is usually fried between 400–450 °F (200–230 °C), but empty cookware can exceed this temperature if left unattended on a hot burner. Over the 40 years non-stick cookware has been in widespread use, there is only one published case of a minor, short-lasting health effect linked to overheating non-stick cookware.[1] A stainless steel frying pan. ... Orders Many - see section below. ...


The EPA's scientific advisory board found in 2005 that perfluorooctanoic acid (PFOA), a chemical compound used to make Teflon, is a "likely carcinogen." This finding was part of a draft report [2] that has yet to be made final. DuPont settled for $300 million in 2004 a lawsuit filed by residents near its manufacturing plant in Ohio and West Virginia based on groundwater pollution from this chemical. Currently this chemical is not regulated by the EPA. Perfluorooctanoic acid (PFOA), also known as C8, is an artificial acid that has many industrial uses. ... In pathology, a carcinogen is any substance or agent that promotes cancer. ... This article is about the DuPont company. ...


In January 2006, DuPont, the only company that manufactures PFOA in the US, has agreed to eliminate releases of the chemical from its manufacturing plants by 2015, but did not commit to completely phasing out its use of the chemical. This agreement is said to apply to not only Teflon used in cookware but in other products such as food packaging, clothing and carpeting. DuPont also stated that it cannot produce Teflon without the use of the chemical PFOA, although it is looking for a substitute.


It is noteworthy that PFOA is not part of the finished product of nonstick cookware or bakeware. It is only used during the manufacture of the product and only a trace amount of PFOA remains after the curing process. There should be no measurable amount of PFOA on a finished pan, provided that it has been properly cured.


External links

Harmful Teflon Chemical To Be Eliminated by 2015 Washington Post Staff Writer Thursday, January 26, 2006; Page A01[4] The Washington Post is the largest and oldest newspaper in Washington, D.C., the capital of the United States. ... The factual accuracy of this article is disputed. ... This article is about the DuPont company. ... This article is about the DuPont company. ... This article is about the DuPont company. ...


References

  • Ellis, D.A.; Mabury, S.A.; Martin, J.W.; Muir, D.C.G. "Thermolysis of fluoropolymers as a potential source of halogenated organic acids in the environment." Nature 2001, 412 (6844), pp. 321-324.
E.I. du Pont de Nemours and Company (DuPont)

Corporate Directors: Alain Belda | Richard H. Brown | Curtis Crawford | Louisa Duemling | John T. Dillon | Charles O. Holliday | Lois Juliber | Masahisa Naitoh | Sean O'Keefe | William K. Reilly | Rodney Sharp | Charles Vest This article is about the DuPont company. ... It has been suggested that Incorporation (business) be merged into this article or section. ... It has been suggested that Board of Trustees be merged into this article or section. ... Alain J. P. Belda has been the Chairman of the Board and Chief Executive Officer of Alcoa since Janaury 2001. ... Richard H. Brown was Chairman and Chief Executive Officer of Electronic Data Systems Corporation from 1999 to 2003; Chief Executive Officer of Cable & Wireless plc from 1996 to 1998; Member of the Board of E.I. du Pont de Nemours and Company since 2001 and Home Depot. ... Curtis Crawford has been a director of DuPont since 1998. ... Louisa C. Duemling has been a Director of DuPont since 1982, a trustee of the Maryland/DC Chapter of The Nature Conservancy and a member of the board of managers of Mount Cuba Center, Inc. ... John T. Dillon, former Chairman and CEO of International Paper (paper and forest products). ... Charles O. Holliday Jr. ... Lois D. Juliber has been a director of DuPont since 1995. ... Masahisa Naitoh has been a director of DuPont since January 2000. ... Sean OKeefe (born January 27, 1956) was the 10th Administrator of NASA, leading the space agency from December 2001 to February 2005. ... William K. Reilly has been a director of DuPont since 1993. ... H. Rodney Sharp III has been a director of DuPont since 1981. ... Charles Chuck Marstiller Vest (born 1941) is a U.S. educator and engineer. ...

Products: ChromaFlair | Corian | Kevlar | Mylar | Neoprene | Nomex | Nylon | Teflon | Tyvek ChromaFlair is the registered trademark for a paint system, created by DuPont, which appears to change colour depending on the light source and viewing angle. ... Corian is a solid surface material composed of acrylic polymer and alumina trihydrate made by DuPont. ... Kevlar (poly-paraphenylene terephthalamide) is the DuPont Company’s brand name for a synthetic material constructed of para-aramid fibers that the company claims is five times stronger than the same weight of steel, while being lightweight, flexible and comfortable. ... Mylar is a trade name of DuPont Teijin Films of Hopewell, VA, United States, for biaxially-oriented polyethylene terephthalate (BOPET) polyester film used for its high tensile strength, chemical and dimensional stability, transparency, and electrical insulation. ... Neoprene is the trade name for a family of synthetic rubbers based on polychloroprene. ... NOMEX® is the brand name of a flame retardant meta-aramid material marketed and first discovered by DuPont in the 1970s. ... Nylon represents a family of synthetic polymers, a thermoplastic material, invented in 1935 by Wallace Carothers at DuPont. ... Tyvek is a synthetic material made of high-density polyethylene fibers; the name is a registered trademark of the DuPont Company. ...

Annual Revenue: $27.3 billion USD ( image:green up.png1.3% FY 2004) | Employees: 60,000 | Stock Symbol: NYSE: DD | Website: www.dupont.com The United States dollar is the official currency of the United States. ... Green up arrow for a positive change in revenue from last fiscal year. ... A fiscal year or financial year is a 12-month period used for calculating annual (yearly) financial reports in businesses and other organizations. ... New York Stock Exchange (June 2003) The New York Stock Exchange (NYSE), also nicknamed the Big Board, is the largest stock exchange in the world (by dollar volume) and second largest by number of listings. ...


 
 

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