Chemical Properties Of Teflon
Polytetrafluoroethylene, a polymer, is popularly known as Teflon. It is constituted by repeating threads of (-CF2-CF2-). This material has a very high density because it sticks together and makes tight crystal structures. It features a very low dynamic and static friction coefficient.
The Guinness Book of World Records names it one among the materials with the slipperiest surfaces in world. Teflon is inert because of the many fluorine atoms around the tight structure of carbon. PTFE is very heavy. The molecular weight of this compound is 30,000 Daltons.
Teflon does not have dipole-dipole forces, despite the C-F bonds. This is because of the fluorine compounds, which are in standard arrangement around carbon atoms which makes the forces negates each other. These properties are advantageous in the chemical and food industry since Teflon does not oxidize or actively react with other substances.
Due to high LDF, it can withstand extreme temperatures, while not losing its chemical properties. Initial m. p. (melting point) of Teflon is 342+/-100C and 327+/-10 degrees is the secondary m. p. (melting point). Teflon retains its properties at extremely high temperatures.
PTFE has very less surface energy of 18.6 Newtons every square meter that makes it oleophobic and hydrophobic. It is resilient to several chemicals and is affected only by alkali metals in their molten state. It is not having strong adhesive powers and is resistant to ultra violet rays. It has remarkable optical properties.
Teflon is used in the electrical industry and the biotech and pharmaceutical industry. It is also used as paints, metal finishing and coatings. It is used in lithographic printing and inks, molded gears and thermoplastics, lubricants and disinfected packaging. It is also used to make optical devices and air bags in cars.
More Articles :