Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/768 |
Resumo: | In this work, the use of ethylene-vinyl acetate copolymer (EVA) in substitution to compatibility agents normally employed in the production of high density polyethylene (HDPE) nanocomposites (such as polyethylene grafted with maleic anhydride - PEMA) was evaluated due to its intrinsic polarity and relative low cost. Two EVAs with different melt flow indexes and vinyl acetate contents and two organophilic clays treated with different organic surfactants were used. It was verified that EVA with lower viscosity and higher polarity showed better interactions with the clay treated organically with polar surfactant. However, these characteristics reduced the HDPE/EVA compatibility. HDPE/EVA/MMT nanocomposites were obtained through melt mixing and subsequently blown as films. An Intercalated nanocomposite (HDPE/EVA 8/C15A) and a nanocomposite characterized by the presence of tactoids of the organoclay (HDPE/EVA 25/C30B) were produced. From rheological, morphological and permeation analysis it was found that the addition of clay modified the interfacial interactions between HDPE and EVA, increasing the system compatibility when compared to the HDPE/EVA blends behavior. Comparing with the HDPE/EVA blends, the better compatibility in nanocomposites were followed by an increase in elastic modulus, yielding and rupture behaviors and permeability properties. But these properties did not increase when compared with the pure HDPE film. The best results were obtained with the HDPE/EVA 8/C15A nanocomposite. |
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Marini, JulianoBretas, Rosario Elida Sumanhttp://genos.cnpq.br:12010/dwlattes/owa/consultapesq.prc_querylisthttp://lattes.cnpq.br/453361025504765463f6b8be-2951-461f-ad9a-61bf65052b402016-06-02T19:11:50Z2008-08-292016-06-02T19:11:50Z2008-03-10MARINI, Juliano. Development and characterization of blown films of HDPE/EVA/organophilic clay nanocomposites. 2008. 211 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2008.https://repositorio.ufscar.br/handle/ufscar/768In this work, the use of ethylene-vinyl acetate copolymer (EVA) in substitution to compatibility agents normally employed in the production of high density polyethylene (HDPE) nanocomposites (such as polyethylene grafted with maleic anhydride - PEMA) was evaluated due to its intrinsic polarity and relative low cost. Two EVAs with different melt flow indexes and vinyl acetate contents and two organophilic clays treated with different organic surfactants were used. It was verified that EVA with lower viscosity and higher polarity showed better interactions with the clay treated organically with polar surfactant. However, these characteristics reduced the HDPE/EVA compatibility. HDPE/EVA/MMT nanocomposites were obtained through melt mixing and subsequently blown as films. An Intercalated nanocomposite (HDPE/EVA 8/C15A) and a nanocomposite characterized by the presence of tactoids of the organoclay (HDPE/EVA 25/C30B) were produced. From rheological, morphological and permeation analysis it was found that the addition of clay modified the interfacial interactions between HDPE and EVA, increasing the system compatibility when compared to the HDPE/EVA blends behavior. Comparing with the HDPE/EVA blends, the better compatibility in nanocomposites were followed by an increase in elastic modulus, yielding and rupture behaviors and permeability properties. But these properties did not increase when compared with the pure HDPE film. The best results were obtained with the HDPE/EVA 8/C15A nanocomposite.Neste trabalho avaliou-se o uso do EVA na substituição de agentes compatibilizantes geralmente empregados na produção de nanocompósitos de PEAD (como o polietileno graftizado com anidrido maleico - PEMA), devido ao seu caráter polar e menor custo relativo. Para tanto, foram utilizadas duas resinas, com diferentes teores de acetato de vinila e índices de fluidez, e duas argilas organofílicas, tratadas com diferentes surfactantes orgânicos. Verificouse que o EVA com menor viscosidade e maior polaridade apresentou melhores interações com a argila organofílica tratada com surfactante polar. Porém, essas características levaram a uma menor compatibilidade com a matriz de PEAD. Os nanocompósitos de PEAD/EVA/MMT foram produzidos através de mistura no estado fundido e conformados na forma de filmes tubulares. Foram obtidos nanocompósitos com estrutura predominantemente intercalada (PEAD/EVA 8/C15A) e caracterizada pela presença de tactóides de argila (PEAD/EVA 25/C30B). Através das analises reológicas, de morfologia e propriedades mecânicas e de permeação, concluiu-se que a adição de argila alterou as interações interfaciais entre o PEAD e o EVA, levando a uma maior compatibilização do sistema, quando comparado ao comportamento observado nas blendas de PEAD/EVA. Em comparação com as blendas de PEAD/EVA, a maior compatibilidade nos nanocompósitos foi acompanhada de melhorias no módulo elástico, no comportamento de escoamento e de ruptura, além de menor permeabilidade. Porém, quando comparado ao filme de PEAD puro, verificou-se uma manutenção das propriedades, sendo que os melhores resultados foram àqueles apresentados pelo nanocompósito de PEAD/EVA 8/C15A.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRNanocompósitosFilmes tubularesPolietileno de alta densidadeEVAENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICADesenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílicaDevelopment and characterization of blown films of HDPE/EVA/organophilic clay nanocompositesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-1e983e14c-124c-422a-a96e-24e26346a86binfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL1972.pdfapplication/pdf5373269https://repositorio.ufscar.br/bitstream/ufscar/768/1/1972.pdfde7cf683e988f154249a684b6bedfe84MD51THUMBNAIL1972.pdf.jpg1972.pdf.jpgIM Thumbnailimage/jpeg6146https://repositorio.ufscar.br/bitstream/ufscar/768/2/1972.pdf.jpgb8752a7043e6778d74c9b7cd1386b7d7MD52ufscar/7682023-09-18 18:30:39.921oai:repositorio.ufscar.br:ufscar/768Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:39Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
dc.title.alternative.eng.fl_str_mv |
Development and characterization of blown films of HDPE/EVA/organophilic clay nanocomposites |
title |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
spellingShingle |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica Marini, Juliano Nanocompósitos Filmes tubulares Polietileno de alta densidade EVA ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
title_full |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
title_fullStr |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
title_full_unstemmed |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
title_sort |
Desenvolvimento e caracterização de filmes tubulares de nanocompósitos de PEAD/EVA/argila organofílica |
author |
Marini, Juliano |
author_facet |
Marini, Juliano |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4533610255047654 |
dc.contributor.author.fl_str_mv |
Marini, Juliano |
dc.contributor.advisor1.fl_str_mv |
Bretas, Rosario Elida Suman |
dc.contributor.advisor1Lattes.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/consultapesq.prc_querylist |
dc.contributor.authorID.fl_str_mv |
63f6b8be-2951-461f-ad9a-61bf65052b40 |
contributor_str_mv |
Bretas, Rosario Elida Suman |
dc.subject.por.fl_str_mv |
Nanocompósitos Filmes tubulares Polietileno de alta densidade EVA |
topic |
Nanocompósitos Filmes tubulares Polietileno de alta densidade EVA ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
In this work, the use of ethylene-vinyl acetate copolymer (EVA) in substitution to compatibility agents normally employed in the production of high density polyethylene (HDPE) nanocomposites (such as polyethylene grafted with maleic anhydride - PEMA) was evaluated due to its intrinsic polarity and relative low cost. Two EVAs with different melt flow indexes and vinyl acetate contents and two organophilic clays treated with different organic surfactants were used. It was verified that EVA with lower viscosity and higher polarity showed better interactions with the clay treated organically with polar surfactant. However, these characteristics reduced the HDPE/EVA compatibility. HDPE/EVA/MMT nanocomposites were obtained through melt mixing and subsequently blown as films. An Intercalated nanocomposite (HDPE/EVA 8/C15A) and a nanocomposite characterized by the presence of tactoids of the organoclay (HDPE/EVA 25/C30B) were produced. From rheological, morphological and permeation analysis it was found that the addition of clay modified the interfacial interactions between HDPE and EVA, increasing the system compatibility when compared to the HDPE/EVA blends behavior. Comparing with the HDPE/EVA blends, the better compatibility in nanocomposites were followed by an increase in elastic modulus, yielding and rupture behaviors and permeability properties. But these properties did not increase when compared with the pure HDPE film. The best results were obtained with the HDPE/EVA 8/C15A nanocomposite. |
publishDate |
2008 |
dc.date.available.fl_str_mv |
2008-08-29 2016-06-02T19:11:50Z |
dc.date.issued.fl_str_mv |
2008-03-10 |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:11:50Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MARINI, Juliano. Development and characterization of blown films of HDPE/EVA/organophilic clay nanocomposites. 2008. 211 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2008. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/768 |
identifier_str_mv |
MARINI, Juliano. Development and characterization of blown films of HDPE/EVA/organophilic clay nanocomposites. 2008. 211 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2008. |
url |
https://repositorio.ufscar.br/handle/ufscar/768 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
-1 -1 |
dc.relation.authority.fl_str_mv |
e983e14c-124c-422a-a96e-24e26346a86b |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de 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 |
dc.publisher.country.fl_str_mv |
BR |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
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Repositório Institucional da UFSCAR |
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