Title :
Effect of fast electron irradiation on the dielectric and pyroelectric response of radially-oriented PVDF film
Author :
Hilczer, B. ; Smogór, H. ; Kutek, J. ; Goslar, J.
Author_Institution :
Inst. of Molecular Phys., Polish Acad. of Sci., Poznan, Poland
Abstract :
Radiation-induced functionalization of ferroelectric P(VDF/TrFE) copolymers was found to be effective in 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 electrons of energies 0.5-1.5 MeV. Radiation damage to the samples was characterized by ESR and IR spectroscopy. An increase in activation energy of segmental motion of the polymer and a downward shift of the freezing temperature of segmental motion and the Curie temperature, induced by electron irradiation, was related to a damage in all-trans conformation of the polymer chain and formation of polar regions.
Keywords :
Curie temperature; dielectric relaxation; electron beam effects; ferroelectric materials; infrared spectra; paramagnetic resonance; polymer blends; polymer films; 0.5 to 1.5 MeV; Curie temperature; ESR spectroscopy; IR spectroscopy; activation energy; dielectric relaxation; fast electron irradiation; ferroelectric copolymers; polymer chain; polymer relaxors; radially-oriented PVDF film; radiation damage; Dielectrics; Electrons; Ferroelectric films; Ferroelectric materials; Infrared spectra; Paramagnetic resonance; Polymers; Production; Pyroelectricity; Temperature;
Conference_Titel :
Electrets, 2005. ISE-12. 2005 12th International Symposium on
Print_ISBN :
0-7803-9116-0
DOI :
10.1109/ISE.2005.1612333
