Publicação
Dielectric behavior in an oriented β-PVDF film and chain reorientation upon transverse mechanical deformation
| Resumo: | Films of semicrystalline poly(vinylidene fluoride) (PVDF) in the β-phase have been studied by means of dielectric measurements and Fourier Transform Infrared Spectroscopy (FTIR). The main goal of the study was to compare the dielectric relaxations of α- and β-PVDF and to improve the understanding of the structural changes that occur in β-PVDF during a mechanical deformation process and their impact in the electromechanical properties of the polymer. A reorientation of the chains and a decrease in the degree of crystallinity with increasing deformation was observed. |
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| Autores principais: | Lanceros-Méndez, S. |
| Outros Autores: | Moreira, M. V.; Mano, J. F.; Schmidt, V. H.; Bohannan, G. |
| Assunto: | PVDF Dielectric Infrared Plastic deformation Relaxation |
| Ano: | 2002 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Films of semicrystalline poly(vinylidene fluoride) (PVDF) in the β-phase have been studied by means of dielectric measurements and Fourier Transform Infrared Spectroscopy (FTIR). The main goal of the study was to compare the dielectric relaxations of α- and β-PVDF and to improve the understanding of the structural changes that occur in β-PVDF during a mechanical deformation process and their impact in the electromechanical properties of the polymer. A reorientation of the chains and a decrease in the degree of crystallinity with increasing deformation was observed. |
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