Fluorinated ethylene propylene melt viscosity

Fluorinated ethylene-propylene (FEP) is a copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). It has a branched structure containing units of -CF2-CF2- and -CF2-CF (CF3)-. It retains most of the favorable properties of PTFE but its melt viscosity is low enough for conventional melt-processing. The introduction of HFP reduces the melting point of polytetrafluoroethylene from 325°C (617°F) to about 260°C (500°F).26... [Pg.20]

Teflon FEP 100 Fluorinated ethylene propylene copolymer (FEP) general purpose, medium viscosity, melt extrusion resin. [Pg.421]

Known in Germany since 1933, polytetrafluoro-ethylene (PTEE) is a semicrystalline resin (92-98% crystallinity), with T = 342°C and melt viscosity of 7 - 10 GPas. Others, more common fluoro-polymers are polychlorotrifluoroethylene (PCTFE), Hostaflon commercialized in 1934, fluorinated ethylene-propylene (FEP), Teflon -FEP introduced in 1972, and numerous copolymers with Tjjj = 260 to 304°C, processable at = 315 to 425°C, and having the degradation temperature, deg 440°C. The fluoropolymers are... [Pg.80]

General Description Fluorinated ethylene propylene (FEP), a melt-processable fluorocarbon, is a copolymer of tetrafluoroethylene (TFE) and hexafluo-ropropylene. Fluorinated ethylene propylene and TFE yield similar properties, with the exception ofTFE s lowermelt viscosity.fl 1 DuPont s high-performance material Teflon FEP film is a transparent, thermoplastic film.P ... [Pg.17]

Lesser [88] studied the continuous extrusion of a range of high-melt-viscosity polymers using a single screw extruder with a temperature-controlled die. Control of the foam morphology (cell density and cell size distribution) of polytetra-fluoroethylene (PTFE), fluorinated ethylene propylene cofxtlymer (FEP), and... [Pg.221]

Copolymers. Fluorinated ethylene propylene (FEP) is a copolymer of tetrafluoroethylene and hexafluoropropylene. It has properties similar to PTFE but with a melt viscosity suitable for molding with conventional toermoplastic processing techniques. The improved processabUity is obtained by replacing one of the fluorine groups on PTFE with a trifluoromethyl group as shown in Fig. 2.4. ... [Pg.61]

FEP polymers are fully fluorinated and melt processible. They have chemical resistance comparable to polytetrafluoroethylene (PTFE). Melt viscosity of FEP is over one million times lower than PTFE. Fluorinated ethylene propylene resins are in general copolymers of tetrafluoroethylene with hexafluoropropylene and possibly one or more other comonomers. Commercial examples of the latter include perfluoroalkyl vinyl ether (PAVE), such perfluoroethyl vinyl ether (PEVE). FEP... [Pg.123]

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