DIELECTRIC-RELAXATION PROPERTIES OF POLY(DIMETHYLPHENYL METHACRYLATE)S

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dc.contributor.authorCALLEJA, RD
dc.contributor.authorDEVINE, I
dc.contributor.authorGARGALLO, L
dc.contributor.authorRADIC, D
dc.date.accessioned2024-01-10T13:47:31Z
dc.date.available2024-01-10T13:47:31Z
dc.date.issued1994
dc.description.abstractThe dielectric relaxations of poly(dimethylphenyl methacrylate)s were studied over a wide frequency and temperature range by two methods. The alpha relaxation, associated with the glass transition temperature, was studied by classical dielectric measurements. Thermal peak cleaning was used to deconvolute the global thermally stimulated current spectra over the range of low temperatures, corresponding to the beta relaxation. The a relaxation involves long-range, generalized and highly cooperative motions of the main chain. They are influenced by the steric hindrance and dipole-dipole interactions relative to the position of the CH3 group of the aryl ring in the polymer repeat unit. As a first approximation it was assumed that the beta process was related only to local motions of the side group, but the activation parameters are too high to be consistent with this assumption. Therefore it was concluded that intermolecular factors and local motions of the main chain could also be involved.
dc.format.extent6 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/0032-3861(94)90064-7
dc.identifier.issn0032-3861
dc.identifier.urihttps://doi.org/10.1016/0032-3861(94)90064-7
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79280
dc.identifier.wosidWOS:A1994MR18400025
dc.information.autorucQuímica;Gargallo L;S/I;98194
dc.information.autorucQuímica;Radic D;S/I;49367
dc.issue.numero1
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final156
dc.pagina.inicio151
dc.publisherELSEVIER SCI LTD
dc.revistaPOLYMER
dc.rightsregistro bibliográfico
dc.subjectDIELECTRIC RELAXATION
dc.subjectPDMPS
dc.subjectTHERMALLY STIMULATED CURRENTS
dc.subjectGLASS-TRANSITION
dc.subjectAMORPHOUS POLYMERS
dc.titleDIELECTRIC-RELAXATION PROPERTIES OF POLY(DIMETHYLPHENYL METHACRYLATE)S
dc.typeartículo
dc.volumen35
sipa.codpersvinculados98194
sipa.codpersvinculados49367
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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