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Title

Dielectric spectroscopy of natural rubber-cellulose II nanocomposites

AuthorsOrtiz-Serna, P.; Díaz-Calleja, Ricardo; Sanchis, M. J.; Riande, Evaristo ; Nunes, R.; Martins, A.; Visconte, L.
KeywordsDielectric spectroscopy
Natural rubber
Stearic acid
Cellulose II
Nanocomposites
Issue Date2011
PublisherElsevier
CitationJournal of Non-Crystalline Solids 357 : 598–604 (2011)
AbstractNanocomposite materials obtained from natural rubber (NR) reinforced with different amounts of cellulose II nanoparticles (in the range of 0 to 30 phr) are studied by dielectric spectroscopy (DS). For comparative purposes the pure materials, NR and cellulose, are also investigated. The dielectric spectra of the nanocomposites exhibit: (a) two overlappedα-relaxations associated respectively with the dynamic glass transitions ofNR (faster process) and of the lipid present in NR; (b) a β-relaxation associated with local chain dynamics of cellulose and (c) a relaxation process associated to the presence of traces of water in cellulose. The spectra exhibit conductivity phenomena at low frequencies and high temperatures. The samples were also studied in the dry state. An explanation is given concerning the cellulose effect on the dielectric properties of the dry and wet nanocomposites
Publisher version (URL)http://dx.doi.org/10.1016/j.jnoncrysol.2010.06.044
URIhttp://hdl.handle.net/10261/60706
DOI10.1016/j.jnoncrysol.2010.06.044
ISSN0022-3093
Appears in Collections:(ICTP) Artículos
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