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

Detalhes bibliográficos
Autor(a) principal: Dall'Agnol, Fernando
Data de Publicação: 2002
Outros Autores: Silva, Josmary R., Zílio, Sérgio C., Oliveira Jr., Osvaldo N., Giacometti, José A. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1002/1521-3927(200211)23:16<948
http://hdl.handle.net/11449/231708
Resumo: A 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.
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spelling Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1Disperse Red-1Free volumeIsomer/isomerizationPhotoinduced birefringencePolystyreneA 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.Instituto de Fisica de Sao Carlos Universidade de São Paulo, CP 369, São Carlos, SP 13560-970Faculdade de Ciencias e Tecnologia Universidade Estadual Paulista, CP 467, Presidente Prudente, SP 19060-900Faculdade de Ciencias e Tecnologia Universidade Estadual Paulista, CP 467, Presidente Prudente, SP 19060-900Universidade de São Paulo (USP)Universidade Estadual Paulista (UNESP)Dall'Agnol, FernandoSilva, Josmary R.Zílio, Sérgio C.Oliveira Jr., Osvaldo N.Giacometti, José A. [UNESP]2022-04-29T08:47:10Z2022-04-29T08:47:10Z2002-11-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article948-951http://dx.doi.org/10.1002/1521-3927(200211)23:16<948Macromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002.1022-1336http://hdl.handle.net/11449/23170810.1002/1521-3927(200211)23:16<9482-s2.0-0037176002Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMacromolecular Rapid Communicationsinfo:eu-repo/semantics/openAccess2024-06-19T12:44:22Zoai:repositorio.unesp.br:11449/231708Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:03:10.320318Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
title Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
spellingShingle Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
Dall'Agnol, Fernando
Disperse Red-1
Free volume
Isomer/isomerization
Photoinduced birefringence
Polystyrene
title_short Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
title_full Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
title_fullStr Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
title_full_unstemmed Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
title_sort Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
author Dall'Agnol, Fernando
author_facet Dall'Agnol, Fernando
Silva, Josmary R.
Zílio, Sérgio C.
Oliveira Jr., Osvaldo N.
Giacometti, José A. [UNESP]
author_role author
author2 Silva, Josmary R.
Zílio, Sérgio C.
Oliveira Jr., Osvaldo N.
Giacometti, José A. [UNESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Dall'Agnol, Fernando
Silva, Josmary R.
Zílio, Sérgio C.
Oliveira Jr., Osvaldo N.
Giacometti, José A. [UNESP]
dc.subject.por.fl_str_mv Disperse Red-1
Free volume
Isomer/isomerization
Photoinduced birefringence
Polystyrene
topic Disperse Red-1
Free volume
Isomer/isomerization
Photoinduced birefringence
Polystyrene
description A 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.
publishDate 2002
dc.date.none.fl_str_mv 2002-11-25
2022-04-29T08:47:10Z
2022-04-29T08:47:10Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1002/1521-3927(200211)23:16<948
Macromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002.
1022-1336
http://hdl.handle.net/11449/231708
10.1002/1521-3927(200211)23:16<948
2-s2.0-0037176002
url http://dx.doi.org/10.1002/1521-3927(200211)23:16<948
http://hdl.handle.net/11449/231708
identifier_str_mv Macromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002.
1022-1336
10.1002/1521-3927(200211)23:16<948
2-s2.0-0037176002
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Macromolecular Rapid Communications
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 948-951
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128452301160448

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