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Título: | Study on the α- and β-relaxations and their relations in poly(5-acryloxymethyl-5-ethyl-1,3-dioxacyclohexane) (PAMED) |
Autor: | Wang, C. J.; Huang, Y. N.; Zhang, W. X.; Guzmön, J.; Nogales, Aurora CSIC ORCID; Ezquerra, Tiberio A. CSIC ORCID; Wang, Y. N.; Riande, Evaristo | Fecha de publicación: | 2002 | Editor: | Wiley-VCH | Citación: | Physica Status Solidi (A) Applied Research 193: 357- 366 (2002) | Resumen: | The dielectric losses of poly(5-acryloxymethyl-5-ethyl-1,3-dioxacyclohexane) (PAMED) synthesized by us are investigated by fitting them using a single Cole-Cole relation or a superposition of a Havriliak-Negami relation and a Cole-Cole relation, respectively, in a wide frequency and temperature range. The β-relaxation intensity increases with increasing temperature but after a crossover temperature T*, it drops slightly. Meanwhile, the α-relaxation strength always decreases and becomes zero at T*. The above mentioned results can be explained by a scenario that the glass-formers in the supercooled liquid and in the glassy state consist of spatially and dynamically heterogeneous solid-like and liquid-like clusters. © 2002 WILEY-VCH Verlag GmbH & Co. KGaA | URI: | http://hdl.handle.net/10261/81006 | DOI: | 10.1002/1521-396X(200209)193:2<357::AID-PSSA357>3.0.CO;2-4 | Identificadores: | doi: 10.1002/1521-396X(200209)193:2<357::AID-PSSA357>3.0.CO;2-4 issn: 0031-8965 |
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