Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno

Detalhes bibliográficos
Autor(a) principal: Bicalho, Luciana Assumpção
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFSCAR
Texto Completo: https://repositorio.ufscar.br/handle/ufscar/7166
Resumo: The work herein aims at investigating the thermo-optical behavior of polyethylene terephthalate and its composites with polyethylene, in real time, by means of an optical module recently developed in our research group. Polyethylene terephthalate was the material of choice because of its various thermal transitions and optical properties. Multilayered films comprising fibers of polyethylene terephthalate sandwiched with polyethylene films were prepared to study the influence of a matrix on the fibers thermo-optical responses. This was investigated by coupling a hot-stage onto a stand-up optical microscopy and placing the optical module into the analyzer slot. The module encompasses adjacent photocells with/without analyzer to read both turbidity (resulting from scattered light) and depolarized light intensity due to crystallites. In order to handling the signal a software was developed in LabView 8.6 platform from National Instruments for data collection, real-time calculation, screen presentation and data saving. In addition, all parameters set on the CSS 450 can be controlled via software. Finally, a digital camera was coupled on the top of the microscope (ocular tube) to allow for both image capturing and video recording. The structural changes arising from the thermal protocol were assessed following the elicited responses present at the depolarized light intensity and turbidity. Both optical phenomena were sensitive to polymer thermal transitions such as glass transition and melting temperature. The photocell with analyzer is able to collect the thermal transitions and the cold crystallization typical of polyethylene terephthalate resin. The introduction of the optical path difference, an alternative way of displaying the optical data as function temperature, makes easier the understanding of molecule mobility, cold crystallization and melting. The narrow relation existent between the optical behavior and that obtained from the differential scanning calorimetry measurements leaded to the validation of the thermo-optical method, which has the advantage to provide additional information on the fiber orientation and stretching.
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spelling Bicalho, Luciana AssumpçãoCanevarolo Júnior, Sebastião Vicentehttp://lattes.cnpq.br/4153664441338178Silva, Jorge Manuel Jardim dahttp://lattes.cnpq.br/5480257384064266http://lattes.cnpq.br/9145602507976724adb055b2-9c3a-4149-af4e-b0d9e68f565e2016-09-15T13:38:16Z2016-09-15T13:38:16Z2015-03-08BICALHO, Luciana Assumpção. Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7166.https://repositorio.ufscar.br/handle/ufscar/7166The work herein aims at investigating the thermo-optical behavior of polyethylene terephthalate and its composites with polyethylene, in real time, by means of an optical module recently developed in our research group. Polyethylene terephthalate was the material of choice because of its various thermal transitions and optical properties. Multilayered films comprising fibers of polyethylene terephthalate sandwiched with polyethylene films were prepared to study the influence of a matrix on the fibers thermo-optical responses. This was investigated by coupling a hot-stage onto a stand-up optical microscopy and placing the optical module into the analyzer slot. The module encompasses adjacent photocells with/without analyzer to read both turbidity (resulting from scattered light) and depolarized light intensity due to crystallites. In order to handling the signal a software was developed in LabView 8.6 platform from National Instruments for data collection, real-time calculation, screen presentation and data saving. In addition, all parameters set on the CSS 450 can be controlled via software. Finally, a digital camera was coupled on the top of the microscope (ocular tube) to allow for both image capturing and video recording. The structural changes arising from the thermal protocol were assessed following the elicited responses present at the depolarized light intensity and turbidity. Both optical phenomena were sensitive to polymer thermal transitions such as glass transition and melting temperature. The photocell with analyzer is able to collect the thermal transitions and the cold crystallization typical of polyethylene terephthalate resin. The introduction of the optical path difference, an alternative way of displaying the optical data as function temperature, makes easier the understanding of molecule mobility, cold crystallization and melting. The narrow relation existent between the optical behavior and that obtained from the differential scanning calorimetry measurements leaded to the validation of the thermo-optical method, which has the advantage to provide additional information on the fiber orientation and stretching.Utilizou-se um sistema de caracterização qualitativa e quantitativa em tempo real do comportamento termo-óptico de fibras poliméricas de polietileno tereftalato (PET) e seus compósitos com polietileno desenvolvido pelo grupo de pesquisa. Ele permite caracterizar suas principias transições térmicas (Tg, cristalização a frio, Tm e Tc) e particularmente a birrefringência, que é fortemente dependente do nível de orientação molecular e da temperatura. O dispositivo termo-óptico foi acoplado a um microscópio óptico de luz polarizada (MOLP) com estágio a quente (Linkam). Esse consiste em um módulo com dois fotodetectores a ser instalado na fenda usada para a inserção do analisador, sendo assim posicionado no caminho óptico do microscópio. Isto permite quantificar a intensidade de luz transmitida, i.e. turbidez e a intensidade de luz transmitida com polarização cruzada, i.e. diferença de caminho óptico OPD e por conseguinte a birrefringência das fibras e de seus compósitos. Tal metodologia permite a captação simultânea dos sinais ópticos e das imagens das amostras durante o aquecimento, passando pelas suas transições térmicas. Todo o sistema é controlado por um programa computacional, especialmente desenvolvido em plataforma LabView8.6, permitindo a gravação simultânea das imagens e dos sinais ópticos. A turbidez se mostrou sensível para a caracterização das temperaturas de fusão. Através da análise simultânea da intensidade de luz transmitida com polarização cruzada das fibras de PET e sua cor comparada á Carta de Cores de Michel-Lévy permitiu a caraterização quantitativa do nível de estiramento molecular das fibras de PET e sua orientação macroscópica nos compósitos. Como técnica padrão utilizou-se a Calorimetria Exploratória Diferencial, que mostrou haver uma boa correlação entre os resultados observados pelas duas técnicas.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarFibras de politereftala etilenoBirrefringênciaMonitoramento ópticoTurbidezMicroscópio óptico de luz polarizadaENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSCaracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietilenoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline6006006b2d5997-da68-4e0a-acd3-60ce6225978finfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissLAB.pdfDissLAB.pdfapplication/pdf3781531https://repositorio.ufscar.br/bitstream/ufscar/7166/1/DissLAB.pdffcc30c9bb1613708fbf75894ef5ad460MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/7166/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissLAB.pdf.txtDissLAB.pdf.txtExtracted texttext/plain112509https://repositorio.ufscar.br/bitstream/ufscar/7166/3/DissLAB.pdf.txt2206aac92a9d0480a36d52933ba34c0aMD53THUMBNAILDissLAB.pdf.jpgDissLAB.pdf.jpgIM Thumbnailimage/jpeg6240https://repositorio.ufscar.br/bitstream/ufscar/7166/4/DissLAB.pdf.jpg8641c498a81e471918d646046fe1739aMD54ufscar/71662023-09-18 18:30:48.268oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:48Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false
dc.title.por.fl_str_mv Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
title Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
spellingShingle Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
Bicalho, Luciana Assumpção
Fibras de politereftala etileno
Birrefringência
Monitoramento óptico
Turbidez
Microscópio óptico de luz polarizada
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
title_short Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
title_full Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
title_fullStr Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
title_full_unstemmed Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
title_sort Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno
author Bicalho, Luciana Assumpção
author_facet Bicalho, Luciana Assumpção
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://lattes.cnpq.br/9145602507976724
dc.contributor.author.fl_str_mv Bicalho, Luciana Assumpção
dc.contributor.advisor1.fl_str_mv Canevarolo Júnior, Sebastião Vicente
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/4153664441338178
dc.contributor.advisor-co1.fl_str_mv Silva, Jorge Manuel Jardim da
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/5480257384064266
dc.contributor.authorID.fl_str_mv adb055b2-9c3a-4149-af4e-b0d9e68f565e
contributor_str_mv Canevarolo Júnior, Sebastião Vicente
Silva, Jorge Manuel Jardim da
dc.subject.por.fl_str_mv Fibras de politereftala etileno
Birrefringência
Monitoramento óptico
Turbidez
Microscópio óptico de luz polarizada
topic Fibras de politereftala etileno
Birrefringência
Monitoramento óptico
Turbidez
Microscópio óptico de luz polarizada
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
dc.subject.cnpq.fl_str_mv ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
description The work herein aims at investigating the thermo-optical behavior of polyethylene terephthalate and its composites with polyethylene, in real time, by means of an optical module recently developed in our research group. Polyethylene terephthalate was the material of choice because of its various thermal transitions and optical properties. Multilayered films comprising fibers of polyethylene terephthalate sandwiched with polyethylene films were prepared to study the influence of a matrix on the fibers thermo-optical responses. This was investigated by coupling a hot-stage onto a stand-up optical microscopy and placing the optical module into the analyzer slot. The module encompasses adjacent photocells with/without analyzer to read both turbidity (resulting from scattered light) and depolarized light intensity due to crystallites. In order to handling the signal a software was developed in LabView 8.6 platform from National Instruments for data collection, real-time calculation, screen presentation and data saving. In addition, all parameters set on the CSS 450 can be controlled via software. Finally, a digital camera was coupled on the top of the microscope (ocular tube) to allow for both image capturing and video recording. The structural changes arising from the thermal protocol were assessed following the elicited responses present at the depolarized light intensity and turbidity. Both optical phenomena were sensitive to polymer thermal transitions such as glass transition and melting temperature. The photocell with analyzer is able to collect the thermal transitions and the cold crystallization typical of polyethylene terephthalate resin. The introduction of the optical path difference, an alternative way of displaying the optical data as function temperature, makes easier the understanding of molecule mobility, cold crystallization and melting. The narrow relation existent between the optical behavior and that obtained from the differential scanning calorimetry measurements leaded to the validation of the thermo-optical method, which has the advantage to provide additional information on the fiber orientation and stretching.
publishDate 2015
dc.date.issued.fl_str_mv 2015-03-08
dc.date.accessioned.fl_str_mv 2016-09-15T13:38:16Z
dc.date.available.fl_str_mv 2016-09-15T13:38:16Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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status_str publishedVersion
dc.identifier.citation.fl_str_mv BICALHO, Luciana Assumpção. Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7166.
dc.identifier.uri.fl_str_mv https://repositorio.ufscar.br/handle/ufscar/7166
identifier_str_mv BICALHO, Luciana Assumpção. Caracterização termo-óptica quantitativa de fibras de poliéster e seus compósitos com polietileno. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7166.
url https://repositorio.ufscar.br/handle/ufscar/7166
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dc.relation.confidence.fl_str_mv 600
600
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus São Carlos
dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM
dc.publisher.initials.fl_str_mv UFSCar
publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus São Carlos
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instacron:UFSCAR
instname_str Universidade Federal de São Carlos (UFSCAR)
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institution UFSCAR
reponame_str Repositório Institucional da UFSCAR
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