Perfluorinated Polymers, Tetrafluoroethylene–Ethylene Copolymers

Abstract Copolymers of ethylene and tetrafluoroethylene (ETFE) have been studied for more than half a century. However, modified ETFE are the products of real commercial value because they have good tensile strength, moderate stiffness, high flex life, and outstanding impact strength, abrasion resistance, and cut‐through resistance. Electrical properties include low dielectric constant, high dielectric strength, excellent resistivity, and low dissipation factor. Thermal and cryogenic performance and chemical resistance are good. This family of polymers can be processed by conventional methods such as melt extrusion, injection molding, transfer molding, and rotational molding. These polymers are synthesized in aqueous, nonaqueous, or mixed medium with free‐radical initiators. The polymer is isolated and converted into extruded cubes, powders, and beads or into dispersion. The general‐purpose resin is used for insulating and jacketing low voltage power wiring for mass transport system, wiring for chemical plants, and control and instrumentation wiring. It is also used to produce sockets, connectors, and switch components. These resins provide good service in seal glands, pipe plugs, corrugated tubing, fasteners, and pump vanes.