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  2. Polytetrafluoroethylene - Wikipedia

    en.wikipedia.org/wiki/Polytetrafluoroethylene

    Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert. [3] The commonly known brand name of PTFE-based composition is Teflon by Chemours, [4] a spin-off from DuPont, which originally discovered the compound in 1938. [4]

  3. ETFE - Wikipedia

    en.wikipedia.org/wiki/ETFE

    Ethylene tetrafluoroethylene (ETFE) is a fluorine-based plastic. It was designed to have high corrosion resistance and strength over a wide temperature range. ETFE is a polymer and its source-based name is poly (ethene-co-tetrafluoroethene). It is also known under the DuPont brand name Tefzel and is sometimes referred to as 'Teflon Film'. ETFE ...

  4. Fluoropolymer - Wikipedia

    en.wikipedia.org/wiki/Fluoropolymer

    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 ...

  5. Tetrafluoroethylene - Wikipedia

    en.wikipedia.org/wiki/Tetrafluoroethylene

    Tetrafluoroethylene is a reactive molecule that participates in myriad reactions. Owing to the presence of four fluorine substituents, its reactions differ strongly from the behavior of conventional alkenes such as ethylene. Tetrafluoroethylene dimerizes, giving octafluorocyclobutane. Even normal alkenes and dienes add tetrafluoroethylene in a ...

  6. Nafion - Wikipedia

    en.wikipedia.org/wiki/Nafion

    Nafion is a brand name for a sulfonated tetrafluoroethylene based fluoropolymer-copolymer synthesized in 1962 by Dr. Donald J. Connolly at the DuPont Experimental Station in Wilmington Delaware (U.S. Patent 3,282,875). Additional work on the polymer family was performed in the late 1960s by Dr. Walther Grot of DuPont. [1]

  7. Surface treatment of PTFE - Wikipedia

    en.wikipedia.org/wiki/Surface_treatment_of_PTFE

    The main effect of sodium etching is defluorination of the PTFE, stripping the fluorine molecules from the carbon backbone of the polymer. The fluorine-to-carbon atomic ratio (F/C ratio) is reduced from PTFE's theoretical ratio of 2.0 to 0.2 or less, after exposure to sodium naphthalene for 1 minute.

  8. Fluorinated ethylene propylene - Wikipedia

    en.wikipedia.org/wiki/Fluorinated_ethylene_propylene

    Fluorinated ethylene propylene (FEP) is a copolymer of hexafluoropropylene and tetrafluoroethylene.It differs from the polytetrafluoroethylene (PTFE) resins in that it is melt-processable using conventional injection molding and screw extrusion techniques. [2]

  9. Roy J. Plunkett - Wikipedia

    en.wikipedia.org/wiki/Roy_J._Plunkett

    When we did, we found more of the powder packed onto the bottom and lower sides of the cylinder. The tetrafluoroethylene in the container had polymerized into polytetrafluoroethylene, a waxy solid with that was found to have had properties such as resistance to corrosion, low surface friction, and high heat resistance.