Non-stick surfaces

Why does poly(tetrafluoroethylene) effectively create a non-stick surface when each bond between the carbon and fluorine is so polar ... 

Teflon is manufaetured by heating tetrafluoroethene with a free radical or persulphate catalyst at high pressures. It Is ehemleally inert and resistant to attack by corrosive reagents. It Is used in making oil seals and gaskets and also used for non - stick surface coated utensils. 

PTFE cf2 = cf2 Non-stick surface, withstands high temperatures Non-stick frying pans, soles of irons... 

Q Cookware with a non-stick surface is easy to clean and can reduce the use of cooking oils and fats. A garden hose made from polyvinyl chloride is sturdy and flexible. 

High temperature resistance, chemically inert. erceiienC electrical insulator. very low coefficient of friction, expensive moldings, film, coatings used for non-stick surfaces, insulation. gasKccs e.g.,Teflon. Fiuon. 

Coated material surfaces Low friction and non-stick surfaces... 

For vacuum seal and heat seal applications The liner of a double-sided tape or vinyl stickers To act as a non-stick surface... 

The ultimate product of the polymerization of the CF, unit is the solid known as poly(tetrafluoroethene) or PTFE (Teflon), used in non-stick surface coverings. In the polymer there are C-C linkages between the tetrafluoroethene monomer units. All the atoms obey the octet rule, all the carbon atoms are four-valent, and each of the fluorine atoms participate in one single bond. That the oxidation state of the carbon is +2 is very misleading. 

There are many other processes where adhesion of partides to surfaces is undesirable, e.g. in detergency, non-stick surfaces, adhesion of bacteria to tooth surface (dental plaque), adhesion of cells to blood vessels (which can cause thrombosis), etc. 

Silicones polymers which can take the form of fluids for lubrication, rubbers or plastics. Silicone resins are employed in electrical insulation applications, including component encapsulation. Silicone rubber is unique among synthetic elastomers being the only one with useful operating temperature, and resistant to weather, ozone, chemicals, with a non-stick surface. Silicones are used as release agents, because of incompatability with most materials, and as lubricants and additives. 

This material may not be joined to itself using solvents as there is no solvent at room temperature. Because of its inert, non-stick surface it is difficult to bond using adhesives some success with contact or hot melt adhesives. If the surface is made polar, for example by using a flame or an electrical disr charge, then this material may be bonded to metals using epoxides or nitrile-phenolic adhesives such treatments also improve printability. 

Teflon High melting point, chemical resistance Non-stick surfaces in cookware... 

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