DIELECTRIC RELAXATIONS IN POLY[2,2-PROPANE-BIS-(4-PHENYL THIOCARBONATE)]

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dc.contributor.authorMARTINEZ, ES
dc.contributor.authorDIAZCALLEJA, R
dc.contributor.authorRIBAS, SM
dc.contributor.authorGARGALLO, L
dc.contributor.authorRADIC, D
dc.date.accessioned2025-01-23T19:22:27Z
dc.date.available2025-01-23T19:22:27Z
dc.date.issued1992
dc.description.abstractThe dielectric relaxation properties of poly[2,2-propane-bis-(4-phenyl thiocarbonate)] (PTC) have been studied. The existence of crystallinity, which can be eliminated by quenching, is detected. The degree of crystallinity of polymer samples was determined by differential scanning calorimetry in order to investigate the effect of this factor on the dielectric behaviour of this polymer. The thermal degradation of the samples was studied by thermogravimetry. The degradation of the polymer begins before the glass transition temperature T(g). The dielectric spectrum is complex showing several relaxation phenomena. With increasing temperature a gamma-relaxation can be observed at - 100-degrees-C (5 kHz). The activation energy obtained from an Arrhenius plot (ln f vs T-1) is 6 kcal mol-1. At 160-degrees-C the alpha-relaxation which is associated with the glass transition temperature T(g) is detected. The dielectric behaviour of this poly(thiocarbonate) is compared with the corresponding poly(carbonate).
dc.fuente.origenWOS
dc.identifier.issn0959-8103
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/99037
dc.identifier.wosidWOS:A1992HX15300007
dc.issue.numero3
dc.language.isoen
dc.pagina.final232
dc.pagina.inicio227
dc.revistaPolymer international
dc.rightsacceso restringido
dc.subjectRELAXATIONS
dc.subjectACTIVATION ENERGY
dc.subjectMOLECULAR MOTIONS
dc.subjectDIELECTRIC SPECTRUM
dc.titleDIELECTRIC RELAXATIONS IN POLY[2,2-PROPANE-BIS-(4-PHENYL THIOCARBONATE)]
dc.typeartículo
dc.volumen28
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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