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Title

Relaxation behavior, at very low frequencies, of glassy polymers containing aliphatic-aromatic side groups in their structures

AuthorsSaez Torres, P.; Sanchis, M. J.; Díaz Calleja, Ricardo; Guzmán, Julio ; Riande, Evaristo
KeywordsPolymers
Glass transition
Glass structure
Permittivity
Issue Date1-Aug-2000
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 88(3): 1593 (2000)
AbstractThe curves depicting the temperature dependence of the global depolarization curves of poly(2-[naphthylacetyl)oxy]ethyl acrylate), poly(2-[naphthylacetyl)oxy]ethyl methacrylate), and the model compound of the side groups of these polymers, 2-(acetyloxy)-ethyl-(2-naphthylacetate), present ostensible glass-rubber relaxations located at –45, 34, and 53 °C, respectively. These values are very close to the respective calorimetric glass transition temperatures of these materials. As these substances exhibit a weak dielectric activity in the glassy state, it was possible to determine the components of the complex dielectric permittivity at very low frequencies from partial depolarization curves obtained on these materials in this state. Possible mechanisms responsible for the subglass relaxations are suggested from the comparison of the relaxation behavior of the model compound and the polymers.
Description7 pages, 13 figures.-- PACS: 61.41.+e; 64.70.Pf; 61.43.Fs; 77.22.Ch; 77.84.Jd
Publisher version (URL)http://dx.doi.org/10.1063/1.373859
URIhttp://hdl.handle.net/10261/21678
DOI10.1063/1.373859
ISSN0021-8979
Appears in Collections:(ICTP) Artículos
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