PTFE relative molecular mass is large, for hundreds of thousands of low, so adjacent CF2 trans orientation of cross are not fully, but form a spiral twisted chain, fluorine atoms are almost covering the whole surface of the polymer chain.This molecular structure explained the various properties of PTFE. Chemical properties of PTFE are as follows: Teflon's chemical structure is all the hydrogen atoms in polyethylene was replaced by fluorine atoms.Its molecular formula is: PTFE f atom in the molecule key C-F key C-C key cover and high stability, apart from the alkali metals and fluorine, it does not any chemical erosion.PTFE f atoms in a molecular symmetry, C-F combines two elements in Covalent, no free electrons in molecules, molecule is neutral as a whole.PTFE has excellent dielectric properties, because the PTFE molecular structure there is no g in key, high crystallinity of it.Because a layer of inert PTFE molecule out of fluorine-containing shell so that it has outstanding non-stick performance with low friction coefficient. Atmospheric aging resistance, radiation resistant performance and a lower permeability: prolonged exposure to the atmosphere, surface and performance remain the same. PTFE does not absorb moisture, non-combustible, very stable on oxygen, UV, so it has excellent weathering resistance. Lubrication: has the lowest coefficient of friction in a plastic, is an ideal oil-free materials. Surface Sticky: known solid materials are not glued on the surface, is a surface to a minimum of solid materials. Although carbon-carbon bond in perfluorocarbon compounds and carbon-fluorine bond fracture needs to absorb energy 346.94 and 484.88kJ/mol respectively, but Teflon 1mol tetrafluoroethylene depolymerization generated only energy 171.38kJ.Due to the high temperature pyrolysis also produce toxic byproducts of fluorine gas and perfluoroisobutylene and so on, so pay special attention to safety and preventing PTFE exposure to open flames.It does not melt in a temperature of 250 ° c, in-260 ℃ cryopreservation without problems.Smooth PTFE exception, even the ice than it; its insulation properties are particularly good, newspapers thick layer of thin films, would be sufficient to resist 1500V high-voltage electricity. PTFE or teflon products manufacturer producing many ptfe products,contact us on PTFE Teflon Glass Cloth Adhesive Tape.
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