Fluoropolymers (PTFE, PCTFE, PFA, ETFE)

Properties and Applications

Fluoropolymers (also known as perfluorinated polymers) are produced from alkenes in which hydrogen atoms have been replaced by fluorine. The most important members of this class of fluoropolymers are polytetrafluoroethylene (PTFE), poly(chlorotrifluoroethylene) (PCTFE), poly(vinyl fluoride) (PVF), and poly(vinylidene fluoride) (PVDF).
Fluoropolymers have excellent chemical resistance and weatherability including UV and ozone resistance which increases with the number of fluorine atoms in the repeat unit. Increasing the fluorine content also improves the electrical properties, lowers the coefficient of friction and raises the melting point; but weakens the mechanical properties.

Fluoropolymers find numerous applications in the electrical industry including coaxial cables for radio frequency, electrical tapes, seat heating, and appliance and aircraft wiring. In the chemical industry, fluoropolymers are used for demanding applications including lined pipes and fittings, gaskets, thread sealant tapes, filters, and membranes that have to withstand harsh and corrosive environments. In the mechanical industry they are used in bearings, seals, piston rings, anti-stick coatings, and self-lubricating parts to name only a few applications.

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