PFA resins

Copolymerizahon of TFE and perfluoro(propyl vinyl ether) (PPVE) yields melt-processable, linear polymers known as perfluoroalkoxy (PFA) resins of the following general structure... [Pg.1108]

Poly(tetrafluoroethylene) (PTFE) Poly(chlorotrifluoroethylene) (PCTFE) Perfluoroalkoxy (PFA) resin Fluorinated ethylene-propylene (FEP) resin... [Pg.1279]

Cryogenic nitrogen plants, 17 275-278 Cryogenic properties, of Teflon PFA resins, 18 333t... [Pg.235]

The need for highly fluorinated thermoplastic polymers that, unlike PTFE, could be fabricated by conventional melt-processing methods led to the development of a group of resins that are copolymers of tetrafluoroethylene (TFE) with other perflu-orinated monomers. Commercially, the copolymer of TFE and hexafluoropropylene (HFP) is commonly known as fluorinated ethylene propylene (FEP). Copolymerization of TFE with perfluoropropylvinyl ether (PPVE) leads to PFA resins, and copolymerization of TFE with perfluoromethylvinyl ether (PMVE) produces MFA resins. [Pg.75]

These polymers are fully fluorinated and melt-processible. They have chemical resistance and thermal stability comparable to those of PTFE. Specific gravity of PFA resins is in the range of 2.12-2.17. It has an upper continuous use temperature of 260° C. [Pg.1037]

Fluoroplastics are a class of paraffinic polymers that have some or all of the hydrogen replaced by fluorine. These include polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP) copolymer, perfluoroalkoxy (PFA) resin, polychlorotrifluoroethylene (PCTFE), ethylene-chlorotrifluoro-ethylene (ECTFE) copolymer, ethylene-tetrafluoroethylene (ETFE) copolymer, polyvinylidene fluoride (PVDF), and polyvinylfluoride (PVF) [186],... [Pg.292]

Perfluoroalkoxy (PFA) resins represent another class of commercially available class of melt-processable fluoroplastics. Their general chemical structure is... [Pg.409]

PFA resin has somewhat better mechanical properties than FEP above 150°C and can be used up to 260°C. In chemical resistance it is about equal to PTFE. PFA resin is sold by Du Pont under the Teflon trademark. [Pg.409]

General Description Perfluoroalkoxy (PFA) films have extremely high temperature resistance. DuPont high-performance material Teflon PFA resin is available in pellet or powder,... [Pg.21]

Figure 9.85 Stress vs. strain at two temperatures for Solvay Solexis Hyflon PFA resin [10],...

Figure 9.86 Stress at break vs. temperature for Soivay Soiexis Hyfion PFA resins [10].

PFA resins have the desirable properties associated with fluoroplastics plus superior creep resistance, and are more easily processed by extrusion and injection molding. [Pg.706]

PFA resins have the desirable properties typical of fluorocarbons, including resistance to virtually all chemicals, antistick, low coefiScient of friction, excellent electrical characteristics, low smoke, excellent flanunability resistance, ability to perform in temperature extremes, and excellent weatherability. The strength and stiffness at high operating temperatures are at least equivalent to those of TFE, and the creep resistance appears to be better over a wide temperature range. PFA parts perform well in the 250°C range. Film and sheet find use as electrical insulation in flat cable and circuitry and in laminates used in electrical and mechanical applications. [Pg.215]

Oven-curing of the CW-PFA resins was performed in two stages, first at 130 °C for 75 min and then at 210 °C for 105 min. Oven-cured samples showed no residual... [Pg.137]

To provide a basis for comparison with PFA modified with CW and MMT, PFA resin without CW or MMT was prepared using 3phr y-alumina (nanopowder, Aldrich) as a catalyst. The resin obtained after reaction at 100 °C for 12 h (denoted y-Al-PFA) was stable during storage (at room temperature) for several months. [Pg.139]

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