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Tetrafluoroethylene perfluoro

Fig. 3. The percent volume swell in benzene after seven days at 21°C compared with the wt % of fluorine on standard recommended compounds. A, copolymers of vinyUdene fluoride—hexafluoropropylene B, terpolymers of vinyUdene fluoride—hexafluoropropylene—tetrafluoroethylene C, terpolymers of vinyhdene fluoride—hexafluoropropylene—tetrafluoroethylene-cure site monomer D, copolymer of tetrafluoroethylene—perfluoro(methyl vinyl ether)-cure... Fig. 3. The percent volume swell in benzene after seven days at 21°C compared with the wt % of fluorine on standard recommended compounds. A, copolymers of vinyUdene fluoride—hexafluoropropylene B, terpolymers of vinyUdene fluoride—hexafluoropropylene—tetrafluoroethylene C, terpolymers of vinyhdene fluoride—hexafluoropropylene—tetrafluoroethylene-cure site monomer D, copolymer of tetrafluoroethylene—perfluoro(methyl vinyl ether)-cure...
In attempts to further improve the stability of fluorine-containing elastomers Du Pont developed a polymer with no C—H groups. This material is a terpolymer of tetrafluoroethylene, perfluoro(methyl vinyl ether) and, in small amounts, a cure site monomer of undisclosed composition. Marketed as Kalrez in 1975 the polymer withstands air oxidation up to 290-315°C and has an extremely low volume swell in a wide range of solvents, properties unmatched by any other commercial fluoroelastomer. This rubber is, however, very expensive, about 20 times the cost of the FKM rubbers and quoted at 1500/kg in 1990, and production is only of the order of 1 t.p.a. In 1992 Du Pont offered a material costing about 75% as much as Kalrez and marketed as Zalak. Structurally, it differs mainly from Kalrez in the choice of cure-site monomer. [Pg.382]

Tetrafluoroethylene-Perfluoro(propyl vinyl ether) Copolymers (PFA)... [Pg.1108]

Tetrafluoroethylene-Perfluoro(2,2-dimethyl-l,3-dioxole) Copolymers (Teflon AF)... [Pg.1111]

Perfluoro terpolymers consisting of tetrafluoroethylene, perfluoro(ethyl vinyl ether), and perfluoro(propyl vinyl ether) have been free radically prepared to have distinguished transparency and good mechanical strength at both ambient temperature and 372°C. These materials are particularly useful as high-strength moldings. [Pg.234]

Carlson, D.P. Heat stable tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers US Patent 4,599,386, Assigned to DuPont Co., July 8, 1986. [Pg.1041]

Tetrafluoroethylene-perfluoro(methyl vinyl Kalrez Du Pont -40% perfluoro(methyl vinyl ether) Ex. air oxidation... [Pg.381]

Polymerization. Copolymers of tetrafluoroethylene/perfluoro(methyl vinyl ether) and the nitrile (1-4 mole ) have been prepared batch-wise in a stirred autoclave using an aqueous ammonium persulfate or ammonium persulfate-sodium sulfite redox couple system at 40°-100° C. The TFE/PMVE gas mixture was pressured, as required, to maintain the pressure and the nitrile pumped in solution in trichlorotrifluoro-ethane. After completion of the reaction, polymer was isolated from the latex (25-30 solids) by coagulation using ethanol and aqueous magnesium chloride solution. It was washed with alcohol/water solutions and dried at 70 °C in an oven under nitrogen. Mass balance indicated that most of the nitrile had been incorporated. [Pg.27]

The polymerization work reported herein requires compression of tetrafluoroethylene-perfluoro(methyl vinyl ether)mixtures. This operation must be considered potentially hazardous and should be carried out only in adequately barricaded areas. [Pg.37]

El-S.A. Hegazy, A.M. Dessouuki, A.M. Rabie and I. Ishigaki, Membranes obtained by preirradiation grafting of acrylic acid onto poly(tetrafluoroethylene-perfluoro-vinyl ether), J. Polym. Sci., Polym. Chem. Ed. 1984, 22, 3673-3685. [Pg.76]

Tetrafluoroethylene-perfluoro- Kalrez (Du Pont) Excellent air oxidationresistance to... [Pg.418]

PF-5060. See Perfluorohexane PF-5070. See Perfluoroheptane PFA. See Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer Pf/co2-Hop . See Hops (Humulus lupulus) extract... [Pg.3278]

Trade Name Synonyms Hyflon MFA 620 [Solvay Solexis http //www.solvaysolexis.com], Hyflon MFA 640 [Solvay Solexis http //WWW. solvaysolexis. com] Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer CAS 26655-00-5 Synonyms PFA... [Pg.4364]

Polyarylate resin Polyarylether ketone resin Polyester carbonate resin Polyetherimide resin Polyethylene, chlorinated Polyethylene glycol Polyethylene, medium density Poly (p-methylstyrene) Poly (p-methylstyrene), rubber-modified Poly (oxy-1,2-ethanediyloxycarbonyl-2,6-naphthalenediylcarbonyl) resin Poly (oxy-p-phenylenesulfonyl-p-phenyleneoxy-p-phenyleneisopropylidene-p-phenylene) resin Poly (phenyleneterephthalamide) resin Polysulfone resin Poly (tetramethylene terephthalate) Polyvinylidene chloride Potassium sorbate Potato (Solanum tuberosum) starch Silica, colloidal Silicone Sodium N-alkylbenzenesulfonate Sodium bicarbonate Sodium tetraborate pentahydrate Starch, pregelatinized Styrene/acrylates copolymer Styrene/butadiene polymer Styrene/DVB copolymer , 1,1 -Sulfonylbis (4-chlorobenzene) polymer with 4,4 -(1-methylethylidene) bis (phenol) and 4,4 -sulfonylbis (phenol) Synthetic wax Tapioca starch Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer Tocopherol Triglycidyl isocyanurate VA/crotonates copolymer Vinyl chloride/ethylene copolymer Wheat (Triticum vulgare) starch... [Pg.5315]

Tetrafluoroethylene/propylene copolymer molding resins, phenolic food-contact Acetaldehyde m-Cresol moldings, building industry Calcium sulfate hemihydrate moldings, chemical-resistant Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer... [Pg.5474]

Tetrafluoroethylene/perfluoro (propyl vinyl ether) copolymer 26657-95-4 Glyceryl dipalmitate... [Pg.6495]

Figure 2.36. Effect of fluoroplasticizer on melt flow index of tetrafluoroethylene/perfluoro(alkyl vinyl) ether. [Data from Steward CH W, Spohn P D, US Patent 5,356,986, 1994.]... Figure 2.36. Effect of fluoroplasticizer on melt flow index of tetrafluoroethylene/perfluoro(alkyl vinyl) ether. [Data from Steward CH W, Spohn P D, US Patent 5,356,986, 1994.]...
For the gasket, instead of PP, poly(phenylene sulfide), poly(ethylene terephthalate), poly(amide), liquid crystal polymer, tetrafluoroethylene/perfluoro-alkyl vinyl ether copolymer resin, PEEK, and poly-(ether nitrile) have been found to be free of explosions and other drawbacks at the reflow temperature [47]. [Pg.163]

TETRAFLUOROETHYLENE-PERFLUORO(PROPYL VINYL ETHER) COPOLYMERS AS WATER-RESISTANT, THIN-FILM ADHESIVES... [Pg.83]

The Poisson equation must be used if the electroneutrality condition does not hold, that is, when the relevant dimensions are not much larger than the Debye length. Examples include very thin membranes including bilayers " - and nanochannels. Mnltiple nanochannel structures may also occur in macroscopic ion-exchange membranes. For example, Nafion (tetrafluoroethylene-perfluoro-3,6-dioxa-4-methyl-7-octenesnlfonic acid copolymer) membranes with 20 vol.% of water have water channels with diameters between 1.8 and 3.5 nm. Also, the potentiometric response of nanoporous reference electrodes has been explained by the presence of nanopores. ... [Pg.798]

Ethylene- tetrafluoroethylene, perfluoro butylethylene Py-GC Sequence length distribution [255]... [Pg.287]

See other pages where Tetrafluoroethylene perfluoro is mentioned: [Pg.327]    [Pg.235]    [Pg.24]    [Pg.5385]    [Pg.5474]    [Pg.214]   
See also in sourсe #XX -- [ Pg.1108 ]



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