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Título: | Molecular dynamics in PVDF/PVA blends as revealed by dielectric loss spectroscopy |
Autor: | Linares, Amelia CSIC ORCID; Nogales, Aurora CSIC ORCID; Rueda, Daniel R. CSIC; Ezquerra, Tiberio A. CSIC ORCID | Fecha de publicación: | 2007 | Editor: | John Wiley & Sons | Citación: | Journal of Polymer Science, Part B: Polymer Physics 45: 1653- 1661 (2007) | Resumen: | The relaxation behavior of a series of compatible poly(vinylidene fluoride) (PVDF) and poly(vinyl acetate) (PVA) blends has been investigated by dielectric spectroscopy in a broad frequency and temperature range. Blends with PVDF content higher than 60% in weight are semicrystalline. Semicrystalline blends show a relaxation (αc) occurring in the crystalline phase of PVDF. Both semicrystalline and amorphous blends exhibit two processes, α and β associated to the overall segmental dynamics and to localized motions in the amorphous phase, respectively. For high PVDF content samples, the β relaxation exhibits an anomalous behavior characterized by a crossover from segmental to local dynamics, upon decreasing temperature, attributed to confinement effects taking place in PVDF segregated regions. © 2007 Wiley Periodicals, Inc. | URI: | http://hdl.handle.net/10261/80856 | DOI: | 10.1002/polb.21210 | Identificadores: | doi: 10.1002/polb.21210 issn: 0887-6266 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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