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Perfluoralkoxy

PTFE (polytetrafluoroethylene) PFA (perfluoralkoxy) Kalrez (Du Pont) PVC (polyvinylchloride) PVDF (Polyvinylidenfluoride) PVA (polyvinylalkoxy) PTFE, PFA and Kalrez expensive, scarcely oxidizable, stable over time, PVC, PVDF, PVA less expensive, slowly oxidizable, less stable over time... [Pg.52]

Seals PTFE (polytetrafluoroethylene) PFA (perfluoralkoxy) Kalrez (Du Pont) ... [Pg.52]

Perfluoralkoxy is a fully fluorinated polymer having the following formula ... [Pg.77]

PFA lacks the physical strength of PTFE at elevated temperatures but has somewhat better physical and mechanical properties than PEP above SOOT (149°C) and can be used up to SOOT (260°C). Like PTFE, PFA is subject to permeation by certain gases and will absorb selected chemicals. Refer to Table 2.23 for the absorption of certain liquids by PFA. Perfluoralkoxy also performs well at cryogenic temperatures. [Pg.77]

Perfluoralkoxy will be attacked by certain halogenated complexes containing fluorine. This includes chlorine trifluoride, bromine trifluoride, iodine pentafluoride, and fluorine. It is also subject to attack by such metals as sodium or potassium, particularly in their molten states. Refer to Table 2.24 for the compatibility of PFA with selected corrodents. Reference [1] provides a more detained listing. PFA has excellent weatherability and is not subject to UV degradation. [Pg.78]

Figure 1.1 Detailed example of a simple duct-based microreactor fabricated from polytetrafluoroethylene (with perfluoralkoxy capping layer). Reagents 1 and 2 interact by diffusive mixing within the reaction coil. The reaction product becomes the continuous phase for an immiscible discontinuous phase,... Figure 1.1 Detailed example of a simple duct-based microreactor fabricated from polytetrafluoroethylene (with perfluoralkoxy capping layer). Reagents 1 and 2 interact by diffusive mixing within the reaction coil. The reaction product becomes the continuous phase for an immiscible discontinuous phase,...
See other pages where Perfluoralkoxy is mentioned: [Pg.180]    [Pg.80]    [Pg.157]    [Pg.31]    [Pg.77]    [Pg.98]    [Pg.127]    [Pg.305]    [Pg.310]    [Pg.286]    [Pg.13]    [Pg.180]    [Pg.80]    [Pg.157]    [Pg.31]    [Pg.77]    [Pg.98]    [Pg.127]    [Pg.305]    [Pg.310]    [Pg.286]    [Pg.13]   


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Perfluoralkoxy (PFA)

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