The copolymer of vinylidenefluoride with trifluoroethylene. are overviewed on its ferroelectric nature. The transitions from ferroelectric to molten phase via. antiferroelectric and paraelectric phases occur due to successive loss of intermolecular and intramolecular and crystalline dipolar order. Chain dynamics together with conformational entropy play a key role. The ferroelectric polarization switching is proven to progress via. nucleation-growth mechanisms. A crystalline motion of an Arrhenius type exists commonly to all phases and reaches 1GHz on melting. A slow dynamics is suggested to exist by a gradual decrease in dielectric permittivity.