Properties: Nonflammable, high polymer. White translucent to opaque solid (depending on thickness). Very inert chemically. Useful temp range from cryogenic to +260°. Melts to an extremely viscous gel at 327° and reverts to the gaseous monomer at temperatures above 400°. d 2.2. Shore hardness 55-56. Tensile strength 3500-4500 psi. Flexural modulus ~80,000-90,000 psi at room temp. Brittle point below -80°. Dielectric constant (at 60 to 3 ´ 109 cycles) 2.0-2.05. Not affected by water, aqua regia, chlorosulfonic acid, acetyl chloride, boron fluoride, hot nitric acid, boiling solns of sodium hydroxide, and organic solvents. Not wetted by water. No substance has been found which will dissolve the polymer at moderate temperatures, but prolonged contact with fluorine, hot plasticizers and polymeric waxes is not recommended. Is subject to cold flow at high pressure. Because of its high melt viscosity molding and sintering techniques similar to those used in powder metallurgy are normally used for fabrication.
Melting point: Melts to an extremely viscous gel at 327° and reverts to the gaseous monomer at temperatures above 400°
Density: d 2.2
CAUTION: Potential symptom of overexposure by inhalation to the heated polymer is polymer fume fever, characterized by dizziness, headache, nausea, chills, weakness, cough, chest tightness, sore throat, pyrexia. See Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams Wilkins, Baltimore, 5th ed., 1984) Section II, p 412; Patty's Industrial Hygiene and Toxicology
vol. 2E, G. D. Clayton, F. E. Clayton, Eds. (John Wiley Sons, New York, 4th ed., 1994) 3791-3793.
Use: For hookup and hookup-type wire in electronic equipment; in computer wire, electrical tape, electrical components, spaghetti tubing. Seals and piston rings, basic shapes, bearings, mechanical tapes, coated glass fabrics. As tubing and sheets for chemical laboratory and process work; for lining reaction vessels; for gaskets and pump packings, sometimes mixed with graphite or glass fibers; as electrical insulator esp in high frequency applications; filtration fabrics; protective clothing. Prosthetic aid.
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