Polytetrafluoroethylene

Jason Chemistry Assessment PTFE history Polytetrafluoroethene (PTFE) (Teflon). The polytetrafluoroethylene was discovered by DuPont's Roy Plunkett in 1938. When he tried to make a new chlorofluorocarbon refrigerant, tetrafluoroethylene was polymerized in a high-pressure storage vessel (the inner wall of the vessel became a catalyst for polymerization). Since Plunkett was measuring the amount of gas used by weighing the bottle

There are many accidental scientific discoveries in history, a very pertinent one being polytetrafluoroethylene (PTFE) or Teflon. It is most popularly used on non-stick cookware, but is also used as a stain repellant, in the production of artificial body parts, as an electrical wire insulator, and as pipe lining to prevent corrosion, among others. Invented by Dr. Roy Plunkett, PTFE pushed the limits of innovation and has been used to improve human health. In recent years, controversy has risen as

they are always in high demand, and new polymers are always being discovered. Where does this leave the now commonplace polymers which once were ubiquitous in commerce? Polymers such as polyoxybenzylmethylenglycolanhydride (Bakelite) and polytetrafluoroethylene (PTFE) were first synthesised in 1907 and 1938 respectively, making them old by polymer standards. Although the original polymer applications are now redundant, they have found uses in new areas of society. This dynamic aspect of polymers

Fundamental Structures and Properties of Teflon and Its Applications in Industry 1. Introduction Polytetrafluoroethylene (PTFE) also known as Teflon is a thermoplastic polymer. It is formed by addition polymerization using the monomer tetrafluroethylene (TFE). Teflon is a strong, waxy and non-flammable resin which is used in many applications especially in corrosive industries due to its resistance to chemicals. In addition, it is able to maintain its physical properties over a wide range of

For some years now there has been quite a bit of controversy as to whether the non-stick Teflon coating on pots and pans is actually harmful to humans. However, more recent there has even been rumor that this marvelous invention that every kitchen maid loves, may actually cause cancer. So how much of this is fact, and how much is just myth? First of all, it may be prudent to explain exactly what Teflon is. Teflon, is the registered trademark of a man-made chemical known as polytetrafluorothylene

LITERATURE REVIEW 1. Etsion and Burstein[12] developed a mathematical model to allow performance prediction of all non-contacting mechanical seals having a regular micro-surface structure in the form of hemispherical pores. Seal performance such as equilibrium face separation, friction torque and leakage across the seal are calculated for a range of seal pressures, pore sizes and pore ratio of the ring surface area. An optimum pore size was found that depends on other variables and corresponds to

The addition polymer that is just too good to be true; polytetrafluoroethylene (C2F4)n. More commonly known as teflon or PTFE, the unique assortment of properties of this thermoplastic including its non-stick characteristics, resistance to liquid, high melting point and low reactivity make it no surprise that PTFE is the plastic of the 20th century. PTFE has an average molecular weight of 100.02 g/mol and was a result of an accidental discovery in 1938 by Roy Plunkett who revealed that a tank of

W. L. Gore Case Analysis Although the name W. L. Gore & Associates may not seem familiar to the ear, in all actuality, its products are some of the most well-known in existence. W. L. Gore is famous for its pioneering work with the polytetrafluoroethylene polymer, which lies as the backbone for many of Gore’s products, including its most famous, Gore-Tex. Founded on January 1, 1958, by the husband and wife team of Bill and Vieve Gore in the basement of their home, W. L. Gore & Associates has

but how often do they think of a fabric? Something so basic that it doesn’t even cross the minds of most people when confronted with this question. There is one entirely unique fabric that can be argued to have revolutionized the world, Polytetrafluoroethylene (PTFE). This wonder material has many benefits, but it also has some consequences. In 1969 an accident occurred, an accident that would change the outdoor and military world forever. A young man with a degree in chemical engineering who had

blood flow to another relatively normal area. It is commonly performed due to (ischemia) that is lack of blood flow caused by atherosclerosis. Autograft is the superior graft material for a vascular bypass, but other synthetic grafts such as polytetrafluoroethylene (Teflon), polyethylene terephthalate (Dacron), or a different person's vein (allograft) are also commonly used(4). Meanwhile, the favored channels for grafting are autologous arteries or veins. Although the use of arteries, such as