1. Teflon By Andrew Tucker IED

2. Evolution of Teflon

3. History of Teflon Teflon was first discovered by Roy J. Plunkett an American chemist in the year 1938 who found that a tank of gaseous tetrafluoroethylene refrigerant had polymerized to a white powder Also known as polytetrafluoroethylene a polymer with repeating chains of -(CF2CF2)- Shortly after it was being distributed on patented under the name Teflon® became known for being a strong, tough, waxy, nonflammable synthetic resin Teflon itself has seen no noticeable change in design rather it continues to be used in different forms of substance machines and devices it was used in The Substance Teflon revolutionized the plastic industry and is considers the most slippery substance in existence

4. History of Teflon Teflon gave birth to limitless applications of benefit to mankind. In 1990, U.S. President George Bush presented the National Medal of Technology to DuPont for the company's pioneering role in the development and commercialization of man-made polymers over the last half century.

5. Uses and properties of Teflon Resistant to ozone, chlorine, acetic acid, ammonia, sulfuric acid and hydrochloric acid. The only chemicals known to affect these coatings are molten alkali metals and highly reactive fluorinating agents. Weather and UV resistance Very few solid substances will permanently adhere to a Teflon coating. While tacky materials may show some adhesion, almost all substances release easily. Resistant to extreme temperatures In fact it can temporarily withstand temperatures of 260C and cryogenic temperatures of -240C and still have the same chemical properties. Low coefficient of friction. Non wetting Teflon finishes are both hydrophobic and oleo phobic, cleanup is easier and more thorough. Exceptional dielectric properties Teflon has a high dielectric strength over many different frequencies, low dissipation factor and high surface resistivity. Dielectric strength is the high voltage that the insulating material can withstand before it breaks down. In addition it has a low dissipation factor; this is the percentage of electrical energy absorbed and lost when current is applied to an insulating material. A low dissipation factor means that the absorbed energy dissipated as heat is low. The high surface resistivity refers to the electrical resistance between opposite edges of an unit square on the surface of an insulating material. Excellent optical properties

6. Marketing applications can be used as an insulation material or in system components Put on Wire and cable for outstanding electrical performance and durability Metal finishing, paints and coatings As flour additives can be added to reduce the wear and tear on load-bearing surfaces. For example in inks and lithographic printing, thermoplastics and molded gears, protective industrial surfaces, lubricants to thicken, and sterile packaging. It can be a clear coating for optical devices, requiring a low refractive index and still perform in aggressive chemical environments over a wide range of use temperatures and light waves (UV-IR). Lightweight surgical lamps, photovoltaic cell glazing, etc. Component in Airbag systems, fuel hose permeation barrier, fuel system, chassis, brake systems, oil filter, etc.

7. Credits http://www2.dupont.com/Teflon/en_US/prod ucts/hist http://www2.dupont.com/Teflon/en_US/prod ucts/hist http://www.lenntech.com/teflon.htm