Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1

Página do item simplificado
dc.contributor.authorDall'Agnol, Fernando
dc.contributor.authorSilva, Josmary R.
dc.contributor.authorZílio, Sérgio C.
dc.contributor.authorOliveira Jr., Osvaldo N.
dc.contributor.authorGiacometti, José A. [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T08:47:10Z
dc.date.available2022-04-29T08:47:10Z
dc.date.issued2002-11-25
dc.description.abstractA theoretical model on the basis of the free-volume concept is presented explaining the temperature dependence of photoinduced birefringence in polystyrene films that contain Disperse Red-1. Birefringence increases with temperature up to 180 K as the free volume for isomerization increases, and then decreases as thermally activated processes dominate. The fast process of birefringence decay has a time constant that increases with temperature at low temperatures, due to the change in photoisomerization.en
dc.description.affiliationInstituto de Fisica de Sao Carlos Universidade de São Paulo, CP 369, São Carlos, SP 13560-970
dc.description.affiliationFaculdade de Ciencias e Tecnologia Universidade Estadual Paulista, CP 467, Presidente Prudente, SP 19060-900
dc.description.affiliationUnespFaculdade de Ciencias e Tecnologia Universidade Estadual Paulista, CP 467, Presidente Prudente, SP 19060-900
dc.format.extent948-951
dc.identifierhttp://dx.doi.org/10.1002/1521-3927(200211)23:16<948
dc.identifier.citationMacromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002.
dc.identifier.doi10.1002/1521-3927(200211)23:16<948
dc.identifier.issn1022-1336
dc.identifier.scopus2-s2.0-0037176002
dc.identifier.urihttp://hdl.handle.net/11449/231708
dc.language.isoeng
dc.relation.ispartofMacromolecular Rapid Communications
dc.sourceScopus
dc.subjectDisperse Red-1
dc.subjectFree volume
dc.subjectIsomer/isomerization
dc.subjectPhotoinduced birefringence
dc.subjectPolystyrene
dc.titleTemperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1en
dc.typeArtigo

Arquivos

Coleções

Artigos - Física, Química e Biologia - FCT