Dynamic mechanical and dielectric relaxations in poly(pentachlorophenyl methacrylate)

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dc.contributor.authorCalleja, RD
dc.contributor.authorJaime's, C
dc.contributor.authorSanchis, MJ
dc.contributor.authorSan Roman, J
dc.contributor.authorGargallo, L
dc.contributor.authorRadic, D
dc.date.accessioned2024-01-10T12:38:26Z
dc.date.available2024-01-10T12:38:26Z
dc.date.issued1998
dc.description.abstractIn the present work, a comparative study of the dynamic mechanical and dielectric properties of two related polymers, poly(pentachlorophenyl methacrylate) (PPCPM) and poly(phenyl methacrylate) (PPhM), was carried out. In both polymers a similar relaxational behaviour was observed. Dielectric relaxation measurements give an improved resolution as compared with that obtained from dynamic mechanical techniques for a given process. The polymers show a secondary loss peak at approximately room temperature and a prominent peak overlapped with the conductivity electrode polarization contributions at temperatures above the glass transition temperature, studied by dielectric relaxation measurements. The activation energy associated with the relaxation process at low temperature is about 77 kJ.mol(-1) (which is similar to that observed in poly(alkyl methacrylates)) whose origin is attributed to the hindered partial rotation of the carboxymethyl group. An improved method of separating dipolar contributions from the non-dipolar ones was used to characterize the high temperature relaxation process and to obtain information from the diffusion coefficient of the conducting species.
dc.fechaingreso.objetodigital2024-06-18
dc.format.extent7 páginas
dc.fuente.origenWOS
dc.identifier.issn1022-1352
dc.identifier.urihttps://doi.org/10.1002/(SICI)1521-3935(19980401)199:4<575
dc.identifier.wosidWOS:000073343000011
dc.information.autorucQuímica;Gargallo L;S/I;98194
dc.information.autorucQuímica;Radic D;S/I;49367
dc.issue.numero4
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final581
dc.pagina.inicio575
dc.publisherWILEY-V C H VERLAG GMBH
dc.revistaMACROMOLECULAR CHEMISTRY AND PHYSICS
dc.rightsacceso restringido
dc.subjectUNPERTURBED DIMENSIONS
dc.subjectDECAY FUNCTION
dc.titleDynamic mechanical and dielectric relaxations in poly(pentachlorophenyl methacrylate)
dc.typeartículo
dc.volumen199
sipa.codpersvinculados98194
sipa.codpersvinculados49367
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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