Polyvinyl fluoride (PVF) has practically the same structure as PVC. Just the halogen chlorine is replaced by the halogen fluorine. However, because the bond of the fluorine atom is much stronger than that of the chlorine atom, PVF is chemically much more resistant and also has higher mechanical strength and higher temperature resistance.
PVF is practically only used as a film, especially for applications with high mechanical and thermal stress.
PVF is known under the brand name Tedlar (Dupont).
Another chemically related polymer is polyvinylidene fluoride PVDF, in which not only the chlorine atom in the monomer of the PVC is replaced by fluorine but additionally one hydrogen atom. Though not of great importance for the plastics technology, PVDF is often used as an electrical component for its piezoelectric and ferroelectric behaviour.