Comparative study of poly(2,3 and 4 methyl cyclohexyl methacrylate)s. Dielectric relaxation spectroscopy (DRS)

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dc.contributor.authorDominguez Espinosa, G
dc.contributor.authorSanchis, MJ
dc.contributor.authorDiaz Calleja, R
dc.contributor.authorPagueguy, C
dc.contributor.authorGargallo, L
dc.contributor.authorRadic, D
dc.date.accessioned2024-01-10T13:47:00Z
dc.date.available2024-01-10T13:47:00Z
dc.date.issued2005
dc.description.abstractThe relaxation properties of poly(methyl cyclohexyl methacrylate)s (P2MCHMA), (P3MCHMA), (P4MCHMA) were analyzed. Dielectric spectroscopy (DS) techniques were used for this purpose. These polymers exhibit prominent alpha peaks, associated to the dynamic glass transitions, and then poorly defined beta-relaxations and two other relaxation zones labelled as gamma and delta-relaxation in order of decreasing temperatures. The alpha relaxation processes were analyzed by means of the free volume theory, using the Vogel-Fulcher-Tammann-Hesse (VFTH) equation and in terms of the Havriliak-Negami (HN) empirical equation. Previously to these analyses, conductive contributions to the loss permittivity were subtracted. The apparent activation energies for the secondary processes under study have been calculated by means of Arrhenius. Comparison with previous relaxation results of poly(cyclohexyl methacrylate) (PCHMA), i.e. the polymer without substituents in the cyclohexyl ring, has been also carried out. In this way, changes in the glass transition absorptions as well as in the secondary processes have been discussed. (c) 2005 Elsevier Ltd. All rights reserved.
dc.fechaingreso.objetodigital08-04-2024
dc.format.extent6 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.polymer.2005.06.109
dc.identifier.eissn1873-2291
dc.identifier.issn0032-3861
dc.identifier.urihttps://doi.org/10.1016/j.polymer.2005.06.109
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79224
dc.identifier.wosidWOS:000231573100024
dc.information.autorucQuímica;Gargallo L;S/I;98194
dc.information.autorucQuímica;Radic D;S/I;49367
dc.issue.numero19
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final8033
dc.pagina.inicio8028
dc.publisherELSEVIER SCI LTD
dc.revistaPOLYMER
dc.rightsacceso restringido
dc.subjectpoly(methyl cyclohexyl methacrylate)s
dc.subjectrelaxation processes
dc.subjectdielectric analysis
dc.subjectVISCOSITY
dc.titleComparative study of poly(2,3 and 4 methyl cyclohexyl methacrylate)s. Dielectric relaxation spectroscopy (DRS)
dc.typeartículo
dc.volumen46
sipa.codpersvinculados98194
sipa.codpersvinculados49367
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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