A fluoropolymer is a polymer that contains atoms of fluorine. They are characterized by an unusual resistance to solvents, acids, and bases. A polymer is a generic term used to describe a substantially long molecule. ... General Name, Symbol, Number fluorine, F, 9 Chemical series halogens Group, Period, Block 17, 2, p Appearance pale greenish-yellow gas Atomic mass 18. ...
Fluoropolymers were discovered serendipitously in 1938 by Dr. Roy J. Plunkett. He was working on freon (for the DuPont corporation) and accidentally polymerized tetrafluoroethylene. The result was PTFE (polytetrafluoroethylene), more commonly known as Teflon. It turned out to be the most slippery material known to man and inert to virtually all chemicals. 1938 was a common year starting on Saturday (link will take you to calendar). ... Roy J. Plunkett (June 26, 1910 - May 12, 1994) was the chemist who accidentally invented Teflon in 1938. ... Freon is a trade name for a group of chlorofluorocarbons used primarily as a refrigerant. ... This article is about the DuPont company. ... Teflon is the brand name of a polymer compound discovered by Roy J. Plunkett (1910-1994) of DuPont in 1938 and introduced as a commercial product in 1946. ...
Fluoropolymers may be either thermosets or thermoplastics. Teflon is the brand name of a polymer compound discovered by Roy J. Plunkett (1910-1994) of DuPont in 1938 and introduced as a commercial product in 1946. ... ETFE (Ethylene TetrafluoroEthylene) - a fluorocarbon-based polymer (a fluoropolymer), a kind of plastic. ... PVDF, or PolyVinylidine DiFluoride, is a highly non-reactive and pure thermoplastic fluoropolymer. ... Viton® is a synthetic rubber and fluoropolymer elastomer commanly used in o-rings. ... Thermosetting plastics (thermosets) refer to a range of polymer materials that cure, through the addition of energy, to a stronger form. ... A thermoplastic is a plastic that softens when heated and hardens again when cooled. ...
The aqueous dispersion of melt-fabricable fluoropolymer is coagulated to form a coagulum of the fluoropolymer, typically by the addition of electrolyte to the aqueous medium and agitating the dispersion.
Fluoropolymer coagulum particles and powder composition are prepared as in Example 1 but with solvent granulation using 10 kg of 1,1,1,2,3,4,4,5,5,5-decafluoropentane after addition of 500 g of 60% nitric acid to form large granules of the coagulated fluoropolymer.
Fluoropolymer coagulum particles made according to the teaching of this invention and acetylene fl are combined as described in Example 1 except that a Henshel mixer is used.
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