Title :
Effect of fast electron irradiation on the dielectric and pyroelectric response of radially-oriented PVDF film
Author :
Hilczer, B. ; Smogór, H. ; Kulek, J. ; Goslar, J.
Author_Institution :
Inst. of Molecular Phys., Polish Acad. of Sci., Poznan
Abstract :
The radiation-induced functionalization of ferroelectric P(VDF/TrFE) copolymers has been found to be effective in the production of polymer relaxors attractive for applications. We studied radiation-induced changes in the dielectric relaxation and pyroelectric response of radially oriented PVDF film irradiated with 1 MeV and 1.5 MeV electrons. Radiation damage to the samples was characterized by ESR and IR spectroscopy. The radiation-induced downward shift of the Curie temperature and the freezing temperature of segmental motions as well as the increase in the dielectric dispersion were related to the damage in all-trans conformation of the polymer chain and formation of polar regions
Keywords :
dielectric relaxation; electron beam effects; ferroelectric Curie temperature; ferroelectric materials; infrared spectra; paramagnetic resonance; permittivity; polymer blends; polymer films; relaxor ferroelectrics; thin films; 1 MeV; 1.5 MeV; Curie temperature; ESR; IR spectroscopy; dielectric dispersion; dielectric relaxation; dielectric response; electron paramagnetic resonance; fast electron irradiation; ferroelectric copolymers; polymer chain; polymer relaxors; pyroelectric response; radially-oriented PVDF film; radiation damage; trans conformation; Dielectrics; Electrons; Ferroelectric films; Ferroelectric materials; Infrared spectra; Paramagnetic resonance; Polymers; Production; Pyroelectricity; Temperature;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2006.247844
