Thermal analysis of poly(vinylidene fluoride) film

When stretched, the crystal phase of poly(vinylidene fluoride), PVDF, exhibits a crystal to crystal α to ß phase transition [A. Lovinger, Poly(vinylidene fluoride), D.C. Basset (Ed.), Developments in Crystalline Polymers, vol. 1, 1982, p. 195]. Typical DSC analysis of this film results in analyzing the relaxed film, which would not be representative of the starting material. This paper will focus on the just mentioned relaxation effect.