Investigation of crystalline orientation, thermodynamic properties and Curie transition of ferroelectric VF/sub 2//TrFE copolymers

Abstract

Summary form only given, as follows. VF/sub 2//TrFE copolymers have been investigated by means of X-ray diffraction, differential scanning calorimetry, optical microscopy, and piezoelectric characterization. The orientation of crystalline axes has been determined by pole figure analysis as a function of poling and processing history Morphology and crystallization kinetics have been studied with an optical microscope, during isothermal crystallization on 70/30 copolymer. Thermodynamic equilibrium temperature and infinite crystal enthalpy were extrapolated from melting temperatures and heats of fusion, measured on DSC thermodiagrams. The influence of monomer composition, processing history, and poling on Curie transition have been investigated, and poling on Curie transition have been investigated, and the resulting piezoelectric characteristics have been determined.<>