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Fluorinated ethylenepropylene

The original basic fluorocarbon, and perhaps the most widely known one, is tetrafluo-roethylene (TFE). It has the optimum electrical and thermal properties and almost complete moisture resistance and chemical inertness. However, TFE does cold-flow or creep at moderate loading and temperatures. Filled modifications of TFE resins are available these are generally stronger than unfilled resins. Fluorinated ethylenepropylene (FEP) is similar to TFE except that its operating temperature is limited to 200°C. FEP is more easily processed,... [Pg.369]

Fig. 12.2 Apparatus for the photooxygenation in flow. (A) Reservoir for the soluutm of dihydroartemisic acid and the sensitizer (tetraphenylporphyrin) in dichloromethane, (B) HPLC pump, (C) mass-flow controller to control the oxygen flow, (D) manometer, (E) oxygen tank. (F) Check valve, (G) ethylene-tetrafluoroethylene T mixer, (H) fluorinated ethylenepropylene copolymer tubing, (I) quartz immersion well connected to a cooling system, (J) Pyrex filter, (K) connection to the medium-pressure mercury arc (450 W), (L) reservoir for the trifluoroacetic acid solution, (M) acid-resistant HPLC pump, (N) polytetrafluoroethylene thermal reactor, (O) back pressure regulator, (P) collection flask. The two solutions are mixed at a flow rate of 2.5 mL min with a stream of oxygen gas (7.5 mL min ). The residence time in the reactor is ca. 2 min. Reprinted with permission from [32]... Fig. 12.2 Apparatus for the photooxygenation in flow. (A) Reservoir for the soluutm of dihydroartemisic acid and the sensitizer (tetraphenylporphyrin) in dichloromethane, (B) HPLC pump, (C) mass-flow controller to control the oxygen flow, (D) manometer, (E) oxygen tank. (F) Check valve, (G) ethylene-tetrafluoroethylene T mixer, (H) fluorinated ethylenepropylene copolymer tubing, (I) quartz immersion well connected to a cooling system, (J) Pyrex filter, (K) connection to the medium-pressure mercury arc (450 W), (L) reservoir for the trifluoroacetic acid solution, (M) acid-resistant HPLC pump, (N) polytetrafluoroethylene thermal reactor, (O) back pressure regulator, (P) collection flask. The two solutions are mixed at a flow rate of 2.5 mL min with a stream of oxygen gas (7.5 mL min ). The residence time in the reactor is ca. 2 min. Reprinted with permission from [32]...
See other pages where Fluorinated ethylenepropylene is mentioned: [Pg.57]    [Pg.125]    [Pg.126]    [Pg.48]    [Pg.370]    [Pg.302]    [Pg.1158]    [Pg.1159]    [Pg.99]    [Pg.1161]    [Pg.1162]    [Pg.211]    [Pg.57]    [Pg.125]    [Pg.126]    [Pg.48]    [Pg.370]    [Pg.302]    [Pg.1158]    [Pg.1159]    [Pg.99]    [Pg.1161]    [Pg.1162]    [Pg.211]   
See also in sourсe #XX -- [ Pg.99 ]

See also in sourсe #XX -- [ Pg.32 ]



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