SURFACE-INDUCED ORGANIZATION OF POLY[VINYLIDENEFLUORIDE-TRIFLUOROETHYLENE] ON NANOSTRUCTURED POLYTETRAFLUOROETHYLENE - THE FERROELECTRIC PHASE-TRANSITION

Highly crystalline and uniaxial oriented PTFE films, nonostructured in one dimension, were used to produce a new kind of fully crystalline, thermo-reversible morphology in the ferroelectric copolymer Poly[Vinyl idenefluoride-Trifluoroetnylene]. The resulting state is built up of r egularly stacked lamella crystals of about 100 nm thickness and latera l dimensions and about 20 mu m building up a superlattice. Two elastic instabilities have been found in the vicinity of the ferroelectric tr ansition of the single crystal.