tetrafluoroethene


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tetrafluoroethene

(ˈtɛtrəˌflʊərəʊˈɛθiːn)
n
(Chemistry) chem a dense colourless gas that is polymerized to make polytetrafluorethene (PTFE). Formula: F2C:CF2. Also called: tetrafluoroethylene
[C20: from tetra- + fluoro- + ethene]
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The other methods used for the manufacturing are decomposition of tetrafluoroethene (TFE) under the influence of an electric arc and polymerization carried out by emulsion method with the help of peroxide initiators, such as hydrogen peroxide (H2[O.sub.2]).
As an example application, poly(tetrafluoroethene) is hydrophobic and lipophobic.
Tetrafluoroethene and polyvinylidene coating can reduce the amount of extractables from stoppers, but it is not a total barrier to extractables and leachables.