Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/704 |
Resumo: | In this work we have obtained transparent nanoblends of poly(styrene-coacrylonitrile) (SAN) as matrix and poly(butylene terephthalate) as a nanometric phase. The materials were produced by means of reactive mixing in a twin screw extrude. The development of compatibilization systems, in order to diminish the dimension of dispersed phase in situ, can be seen as a great scientific challenge in nanoblends field. In such case, the compatibilizer optimizes the comminution and prevents the coalescence process of the dispersed phase. The compatibilization between SAN and PBT phases was performed using terpolymers of methyl methacrylate (MMA), glycidyl methacrylate (GMA), and ethyl acrylate (EA), denoted as MGE. Using bulk polymerization, we have applied different conditions for compatibilizer syntheses, in order to achieve a decreasing in the MGE molecular weight. The analyses of the reactivity of different compatibilizer with PBT were accomplished by using both torque rheometry and transmission electron microscopy. We have noticed that as the molecular weight of MGE decreases, the particles sizes of the dispersed phase diminishes accordingly. This part of the study culminated in the selection of the better MGE for nanoblends production. Blends with concentration varying from 3 to 30% wt were prepared in an extruder. These nanoblends were characterized with respect to thermal, dynamic-mechanical, rheological, mophorlogical and optical properties. We have shown that the MGE incorporation presents a high-efficiency for the decreasing of the PBT domains and plays an important role for the optical properties of the resulting nanoblends. |
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Costa, Lidiane CristinaHage Júnior, Eliashttp://lattes.cnpq.br/1240692926327687http://lattes.cnpq.br/8246109223926480c3114f43-669a-4f5e-a6b6-6f01714c72152016-06-02T19:10:14Z2013-06-192016-06-02T19:10:14Z2012-08-02COSTA, Lidiane Cristina. Development nanostructured blends san / pbt modified with reactive acrylic copolymers. 2012. 251 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2012.https://repositorio.ufscar.br/handle/ufscar/704In this work we have obtained transparent nanoblends of poly(styrene-coacrylonitrile) (SAN) as matrix and poly(butylene terephthalate) as a nanometric phase. The materials were produced by means of reactive mixing in a twin screw extrude. The development of compatibilization systems, in order to diminish the dimension of dispersed phase in situ, can be seen as a great scientific challenge in nanoblends field. In such case, the compatibilizer optimizes the comminution and prevents the coalescence process of the dispersed phase. The compatibilization between SAN and PBT phases was performed using terpolymers of methyl methacrylate (MMA), glycidyl methacrylate (GMA), and ethyl acrylate (EA), denoted as MGE. Using bulk polymerization, we have applied different conditions for compatibilizer syntheses, in order to achieve a decreasing in the MGE molecular weight. The analyses of the reactivity of different compatibilizer with PBT were accomplished by using both torque rheometry and transmission electron microscopy. We have noticed that as the molecular weight of MGE decreases, the particles sizes of the dispersed phase diminishes accordingly. This part of the study culminated in the selection of the better MGE for nanoblends production. Blends with concentration varying from 3 to 30% wt were prepared in an extruder. These nanoblends were characterized with respect to thermal, dynamic-mechanical, rheological, mophorlogical and optical properties. We have shown that the MGE incorporation presents a high-efficiency for the decreasing of the PBT domains and plays an important role for the optical properties of the resulting nanoblends.Neste trabalho nanoblendas polimericas transparentes a base de poli(estirenoco- acrilonitrila) (SAN) como matriz e o poli(tereftalato de butileno) (PBT) como fase nanometrica foram obtidas. Esses materiais foram produzidos por meio de mistura reativa em uma extrusora dupla rosca. Um grande desafio cientifico e tecnologico para a area de nanoblendas e desenvolver sistemas de compatibilizacao in situ a fim de reduzir as dimensoes da fase dispersa na matriz polimerica. Neste caso, o compatibilizante exerce a acao de otimizar o processo de cominuicao da fase dispersa e prevenir a etapa de coalescencia. A compatibilizacao entre as fases SAN e PBT foi realizada atraves de terpolimeros (MGE) sintetizados a partir dos monomeros metacrilato de metila (MMA), metacrilato de glicidila (GMA) e acrilato de etila (EA). Por meio do metodo de polimerizacao em massa, diferentes condicoes de sintese para o compatibilizante foram aplicadas a fim de alcancar uma reducao da massa molar do MGE. A reatividade de diferentes compatibilizantes com o PBT foi avaliada principalmente atraves de reometria de torque e microscopia eletronica de transmissao. Observou-se uma diminuicao no tamanho de particulas da fase dispersa em funcao do decrescimo da massa molar do terpolimero. Esta etapa do estudo culminou na selecao do MGE com melhor desempenho e potencial para que nanoblendas fossem alcancadas durante o processo de extrusao reativa. Blendas com concentracoes de PBT variando entre 3 e 30% em massa foram preparadas em extrusora. Essas nanoblendas foram caracterizadas quanto as suas propriedades termicas, dinamicomecanicas, reologicas, morfologicas e opticas. A incorporacao de MGE apresentou grande eficiencia na diminuicao do tamanho da fase dispersa de PBT na matriz de SAN e desempenhou papel fundamental nas propriedades opticas das nanoblendas.Universidade Federal de Minas Geraisapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRBlendas poliméricasMateriais nanoestruturadosSAN/PBTExtrusão reativaPropriedades ópticasENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICADesenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativosDevelopment nanostructured blends san / pbt modified with reactive acrylic copolymersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-1-1f1ae4772-6abc-474a-a0dc-4be6bc3d1282info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL5196.pdfapplication/pdf22493258https://repositorio.ufscar.br/bitstream/ufscar/704/1/5196.pdf562e3f2b87d44d3e5dd250f72475601cMD51TEXT5196.pdf.txt5196.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/704/2/5196.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAIL5196.pdf.jpg5196.pdf.jpgIM Thumbnailimage/jpeg6192https://repositorio.ufscar.br/bitstream/ufscar/704/3/5196.pdf.jpg9091bcbfc81e27c2ee5cc95d7172f7bcMD53ufscar/7042023-09-18 18:31:27.782oai:repositorio.ufscar.br:ufscar/704Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:27Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
dc.title.alternative.eng.fl_str_mv |
Development nanostructured blends san / pbt modified with reactive acrylic copolymers |
title |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
spellingShingle |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos Costa, Lidiane Cristina Blendas poliméricas Materiais nanoestruturados SAN/PBT Extrusão reativa Propriedades ópticas ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
title_full |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
title_fullStr |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
title_full_unstemmed |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
title_sort |
Desenvolvimento de blendas nanoestruturadas SAN/PBT modificadas com copolímeros acrílicos reativos |
author |
Costa, Lidiane Cristina |
author_facet |
Costa, Lidiane Cristina |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/8246109223926480 |
dc.contributor.author.fl_str_mv |
Costa, Lidiane Cristina |
dc.contributor.advisor1.fl_str_mv |
Hage Júnior, Elias |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1240692926327687 |
dc.contributor.authorID.fl_str_mv |
c3114f43-669a-4f5e-a6b6-6f01714c7215 |
contributor_str_mv |
Hage Júnior, Elias |
dc.subject.por.fl_str_mv |
Blendas poliméricas Materiais nanoestruturados SAN/PBT Extrusão reativa Propriedades ópticas |
topic |
Blendas poliméricas Materiais nanoestruturados SAN/PBT Extrusão reativa Propriedades ópticas ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
In this work we have obtained transparent nanoblends of poly(styrene-coacrylonitrile) (SAN) as matrix and poly(butylene terephthalate) as a nanometric phase. The materials were produced by means of reactive mixing in a twin screw extrude. The development of compatibilization systems, in order to diminish the dimension of dispersed phase in situ, can be seen as a great scientific challenge in nanoblends field. In such case, the compatibilizer optimizes the comminution and prevents the coalescence process of the dispersed phase. The compatibilization between SAN and PBT phases was performed using terpolymers of methyl methacrylate (MMA), glycidyl methacrylate (GMA), and ethyl acrylate (EA), denoted as MGE. Using bulk polymerization, we have applied different conditions for compatibilizer syntheses, in order to achieve a decreasing in the MGE molecular weight. The analyses of the reactivity of different compatibilizer with PBT were accomplished by using both torque rheometry and transmission electron microscopy. We have noticed that as the molecular weight of MGE decreases, the particles sizes of the dispersed phase diminishes accordingly. This part of the study culminated in the selection of the better MGE for nanoblends production. Blends with concentration varying from 3 to 30% wt were prepared in an extruder. These nanoblends were characterized with respect to thermal, dynamic-mechanical, rheological, mophorlogical and optical properties. We have shown that the MGE incorporation presents a high-efficiency for the decreasing of the PBT domains and plays an important role for the optical properties of the resulting nanoblends. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012-08-02 |
dc.date.available.fl_str_mv |
2013-06-19 2016-06-02T19:10:14Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:10:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
COSTA, Lidiane Cristina. Development nanostructured blends san / pbt modified with reactive acrylic copolymers. 2012. 251 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2012. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/704 |
identifier_str_mv |
COSTA, Lidiane Cristina. Development nanostructured blends san / pbt modified with reactive acrylic copolymers. 2012. 251 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2012. |
url |
https://repositorio.ufscar.br/handle/ufscar/704 |
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por |
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openAccess |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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