PVDF(Polyvinylidene fluoride)is nominated as F-2 in short, whose
English Name PolyVinylidene Fluoride(PVDF for short),molecular
formula (CF2-CH2)n and molecular weight is 400~600 thousand.

PVDF is one of fluoride plastics developed in 1960s, it is a
homopolymer which formed under the actions of trifluoroethylene,
hydrofluoric acid and zinc dust, and polymerized into white
crystalline solid.