Ethylene Tetrafluoroethylene ETFE

ETFE is an alternating copolymer of ethylene and tetrafluoroethylene by duPont imder the tradename of Tefzel and has the following structural formula [Pg.51]

ETFE is a high-temperature fluoropolymer with a maximum service temperature of SOOT (149°C). [Pg.51]

Tefzel is a rugged thermoplastic with an outstanding balance of properties. It can be reinforced with carbon or glass fibers, being the first fluoroplastic that can be reinforced, not merely filled. Because the resin will bond to the fibers, strength, stiffness, creep resistance, heat distortion temperature, and dimer sional stability are enhanced. [Pg.51]

ETFE is inert to strong mineral acids, halogens, inorganic bases, and metal salt solutions. Carboxylic acids, aldehydes, aromatic and aliphatic hydrocarbons, alcohols, ketones, esters, chlorocarbons, and classic polymer solvents have little effect on ETFE. Tefzel is also weather resistant and ultraviolet ray resistant. [Pg.51]

Very strong oxidizing acids such as nitric, organic bases such as amines, and sulfuric acid at high concentrations and near their boiling points will affect ETFE to various degrees. Refer to Table 2.14 for the compatibility of ETFE with selected corrodents. Reference [1] provides a more extensive listing. [Pg.51]

Examples of fluoroplastics include polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), ethylene—chlorotrifluoroethylene (ECTFE), ethylene—tetrafluoroethylene (ETFE), poly(vinylidene fluoride) (PVDF), etc (see Fluorine compounds, organic). These polymers have outstanding electrical properties, such as low power loss and dielectric constant, coupled with very good flame resistance and low smoke emission during fire. Therefore, in spite of their relatively high price, they are used extensively in telecommunication wires, especially for production of plenum cables. Plenum areas provide a convenient, economical way to run electrical wires and cables and to interconnect them throughout nonresidential buildings (14). Development of special flame-retardant low smoke compounds, some based on PVC, have provided lower cost competition to the fluoroplastics for indoors application such as plenum cable, Riser Cables, etc. [Pg.327]

Polyvinyl chloride (Poly) ethylene tetrafluoroethylene (ETFE) Tefzel... [Pg.302]

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]

Extrusion-Applied Insulations. The polymers used in extrusion applications can be divided into two classes low-temperature applications and high-temperature applications. Polymers in the first category are poly(vinyl chloride), polyethylene, polypropylene, and their copolymers along with other elastomers. Polymers in the second category are mainly halocarbons such as Teflon polytetrafluoroethylene (which requires special extrusion or application conditions), fluoroethylene-propylene copolymer (FEP), perf luoroalkoxy-modified polytetrafluoroethylene (PFA), poly(ethylene-tetrafluoroethylene) (ETFE), poly(vinylidene fluoride) (PVF2) (borderline temperature of 135 °C), and poly(ethylene-chlorotrifluoroethylene). Extrusion conditions for wire and cable insulations have to be tailored to resin composition, conductor size, and need for cross-linking of the insulating layer. [Pg.523]

Cotton, polyamide, polyester, glass fibre, aramids, carbon fibres, fluoro-polymer fibres (polytetrafiuoroethylene (PTFE), polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene (ETFE)) and metal wires can all be used as fibre materials. [Pg.130]

Fluoropolymers are polytetrafluoroethylene (PTFE) and ethylene tetrafluoroethylene (ETFE). They can assist as redundant insulation and are primarily used as a coating to defend conductor wires from corrosion. The advantages of those materials are their inert and biocompatible behavior and high tensile strength. Otherwise, their stiffness, creep. [Pg.11]

No. 11, May 1997, p.2753-8 PHASE TRANSITION IN ETHYLENE-TETRAFLUOROETHYLENE (ETFE) ALTERNATING COPOLYMER. A SPECTROSCOPIC STUDY Radice S Del Fanti N Zerbi G Ausimont Milano,Politecnico... [Pg.86]

The significant contribution of Nafion or perfluorosulfonic membranes to the cost of the fuel cells stacks and the high alcohol crossover levels that affect the fuel efficiency, prompted the development of radiation grafted proton exchange membranes based on poly(ethylene-tetrafluoroethylene) (ETFE) [172-178], PVdF [175], andPTFE [179]. The peroxy radicals produced on the base polymer by y-ray, electron- or proton-beam, react with styrene to form a co-polymer that is then sulphonated. [Pg.130]

Feng et al. tested SIMS as an analytical technique for distinguishing between two polymers having an identical composition and a similar chain sequence structure ethylene-tetrafluoroethylene (ETFE) copolymer and poly(vinylidene fluoride) (PVDF) [142]. The positive ToF-SIMS spectra, obtained under 8 kV Cs" bombardment, showed that ETFE generates Q, C2, C3, C4, and C5 ions, while PVDF only produces Ci, C2, and C3 ions. These results clearly imply that sequence structure can significantly influence the positive SIMS spectra of... [Pg.972]

Ethylene tetrafluoroethylene (ETFE) Ethylene chlorotrifluoroethylene (ECTFE)... [Pg.28]

The melt processible fluoroplastics are often desired due to the cost benefits of melt extrusion over paste extrusion. FEP, PEA and specially formulated melt processible perfluoroplastics are used in many of these applications however, in some of these applications, perfluoroplastics may not be the ideal choice. In cases where high cut-through resistance and better tensile properties are required, it is often desirable to employ a partially fluorinated polymer such as ETFE (ethylene-tetrafluoroethylene). ETFE is the copolymer of ethylene and TEE [16] that normally includes an additional termonomer to increase the flexibility required in commercial applications [17]. The increased physical and electronic interactions of the ETFE polymer chain are responsible for the comparatively enhanced physical properties. Additionally, the partially fluorinated polymers may be cross-linked to further improve physical properties. These benefits, however, are obtained at the expense of the unique properties of perfluoroplastics discussed in the Introduction and Overview. [Pg.605]

Standard injection and extrusion equipment is used with the lower-viscosity polymers fluorinated ethylene propylene (FEP), ethylene tetrafluoroethylene (ETFE), polyvinyli-denefluoride (PVDF), polyperfluoroalkoxyethylene (PFA), ethylene chlorotrifluoroethyl-ene (ECTFE), and others. This substitution, or copolymerization, where fluorine atoms have substitutes, results in property and processing changes. [Pg.421]

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