Title :
Polarization and structural transitions of irradiated vinylidene fluoride-trifluoroethylene copolymer
Author :
Balizer, E. ; DeReggi, A.S. ; Neumann, D.A. ; Bateman, F.
Author_Institution :
Caderock Div., Naval Surface Warfare Center, West Bethesda, MD, USA
Abstract :
The structure and polarization of the vinylidene fluoride-trifluoroethylene copolymer (50/50 mass ratio), a composition in the range that was first reported to show giant electrostriction after electron irradiation, has been studied by neutron scattering under an electric field. In addition, nonirradiated and irradiated samples were studied by thermal analysis and by the thermal pulse method. Both irradiation-induced melting-point and Curie-point depression and broadening were observed, but no field-induced reversible crystal-crystal conversion was observed in the irradiated specimens
Keywords :
electron beam effects; electrostriction; ferroelectric Curie temperature; ferroelectric materials; melting point; neutron diffraction; organic insulating materials; polymer blends; polymer structure; thermal analysis; Curie-point broadening; Curie-point depression; VDF-TrFE copolymer; electric field; electron irradiation; giant electrostriction; irradiated vinylidene fluoride-trifluoroethylene copolymer; irradiation-induced melting-point; neutron scattering; polymer polarization; polymer structure; structural transitions; thermal analysis; thermal pulse method; Aluminum; Crystallization; Electron beams; Electrostriction; Ferroelectric materials; Lattices; NIST; Neutron spin echo; Polarization; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.804603
