MECHANICAL FRACTURE AND ELECTRIC FATIGUE-RESISTNACE BEHAVIOR OF FERROELECTRIC P(VDF-TRFE-CFE) TERPOLYMER FILMS

摘要

Uniaxial tension and polarization evolution under cyclic electric field are investigated for poly(vinylidene fluoride-trifluorethylene-chlorofluoroethylene (PVDF-TrFE-CFE) terpolymer films. The stress-strain behavior of the terpolymer film exhibits that of polymeric elastomers, with its fracture strain reaching 680%. Structure analysis demonstrates that the polymer chains undergo reorientation, and conformational change from the non-polar to the polar phase takes place during uniaxial tension. Under cyclic electric field, the terpolymer film demonstrates excellent resistance to electric fatigue.