Title :
Contribution of defects to the ferroelectric to paraelectric phase transition in polyvinylidenefluoride trifluoroethylene copolymers
Author :
Latour, M. ; Almairac, R. ; Moreira, R.L.
Author_Institution :
Lab. de Phys. Moleculaire et Cristalline, Univ. des Sci. et Tech. du Languedoc, Montpellier, France
fDate :
6/1/1989 12:00:00 AM
Abstract :
X-ray techniques have been used to study the ferroelectric-to-parametric phase transition in polyvinylidene fluoride trifluoroethylene copolymers. Thermal cycles for copolymers with 20 to 40 mol% trifluoroethylene are presented. Clear evidence of anchoring, memory, and relaxation effects has been shown. These effects could be related to mobile defects present in the copolymer
Keywords :
X-ray diffraction examination of materials; ferroelectric materials; ferroelectric transitions; polymer blends; X-ray techniques; anchoring; ferroelectric-to-parametric phase transition; memory; mobile defects; polyvinylidene fluoride trifluoroethylene copolymers; relaxation effects; thermal cycles; Deconvolution; Dielectric materials; Erbium; Ferroelectric materials; Heating; Polymers; Temperature control; Temperature dependence; Temperature distribution; X-ray diffraction;
Journal_Title :
Electrical Insulation, IEEE Transactions on
