Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita

Detalhes bibliográficos
Autor(a) principal: Santos, Cristiane Ramos dos
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFS
Texto Completo: https://ri.ufs.br/handle/riufs/3516
Resumo: This work studied the rheological and mechanical properties of polyamide 12 modified montmorillonite clays and bentonita (the organo-modified commercial montmorillonite and a bentonite modified by various routes. Two polyamides 12 were used for the polyamide matrix, a virgin and another reprocessed. The polyamide 12 reprocessed was derived from tailings lines of fluid transport in automotive vehicles. Ten different compositions were prepared in single-screw extruder, and subsequently molded test specimens by injection. For formulations reprocessed polyamide 12, were added 5 to 7 wt.% of a commercial organo-modified montmorillonite ( I44P ) and the virgin polyamide 12 , 3 and 5 wt.%. For virgin polyamide matrix, also formulations were studied with 3 and 5% by weight of bentonite treated with Agent Titanate. The nanocomposite structure formation was evaluated by X-ray diffraction. For all developed formulations, mechanical and rheological tests, and their results were correlated performed: polyamide matrices, the content and the treatments of the clays. Clay dispersion and morphology of the fracture surface were analyzed by SEM. The analysis results showed distinct mechanical and rheological behaviors depending on the type of matrix, the degree of dispersion of clay, content and type of treatment of clays. There was formation of nanocomposites for polyamide 12 modified with I44P clay and composites for polyamide 12 modified bentonite. The rheological properties confirm the increase of the elastic properties of the nanocomposites due to the restriction to macromolecular mobility. The addition of organophilic commercial montmorillonite (I44P) promoted the increased stiffness of the nanocomposites without significant loss of toughness.
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spelling Santos, Cristiane Ramos doshttp://lattes.cnpq.br/6216349050353010Batista, Wilton Walterhttp://lattes.cnpq.br/77980742448720342017-09-26T12:02:01Z2017-09-26T12:02:01Z2014-04-30https://ri.ufs.br/handle/riufs/3516This work studied the rheological and mechanical properties of polyamide 12 modified montmorillonite clays and bentonita (the organo-modified commercial montmorillonite and a bentonite modified by various routes. Two polyamides 12 were used for the polyamide matrix, a virgin and another reprocessed. The polyamide 12 reprocessed was derived from tailings lines of fluid transport in automotive vehicles. Ten different compositions were prepared in single-screw extruder, and subsequently molded test specimens by injection. For formulations reprocessed polyamide 12, were added 5 to 7 wt.% of a commercial organo-modified montmorillonite ( I44P ) and the virgin polyamide 12 , 3 and 5 wt.%. For virgin polyamide matrix, also formulations were studied with 3 and 5% by weight of bentonite treated with Agent Titanate. The nanocomposite structure formation was evaluated by X-ray diffraction. For all developed formulations, mechanical and rheological tests, and their results were correlated performed: polyamide matrices, the content and the treatments of the clays. Clay dispersion and morphology of the fracture surface were analyzed by SEM. The analysis results showed distinct mechanical and rheological behaviors depending on the type of matrix, the degree of dispersion of clay, content and type of treatment of clays. There was formation of nanocomposites for polyamide 12 modified with I44P clay and composites for polyamide 12 modified bentonite. The rheological properties confirm the increase of the elastic properties of the nanocomposites due to the restriction to macromolecular mobility. The addition of organophilic commercial montmorillonite (I44P) promoted the increased stiffness of the nanocomposites without significant loss of toughness.Este trabalho estudou as propriedades reológicas e mecânicas de poliamida 12 modificadas com montmorilonitas, sendo uma montmorilonita organofilica comercial (I44P) e montmorilonita sódica (bentonita) modificada por diversas rotas. Para a matriz de poliamida, foram utilizadas duas poliamidas 12, sendo uma virgem e a outra reprocessada oriunda de rejeito de linhas de transporte de fluídos em veículos automotores. Foram preparadas dez composições diferentes em extrusora monorrosca e, posteriormente, moldados corpos de prova por injeção. Para as formulações de poliamida 12 reprocessada, foram adicionados 5 e 7% em massa de montmorilonita organofílica comercial e para a poliamida 12 virgem, 3 e 5%. Para esta mesma matriz de poliamida virgem, também foram estudadas formulações com 3 e 5% em massa das bentonitas tratadas com agente titanato. A formação de estrutura de nanocompósitos foi avaliada por difração de raios-X. Para todas as formulações desenvolvidas, foram realizados ensaios mecânicos e reológicos, e seus resultados correlacionados com: as matrizes de poliamida, o teor e os tratamentos das argilas. A dispersão da argila e a morfologia da superfície de fratura foram avaliadas por MEV. Os resultados das análises mostraram comportamentos mecânicos e reológicos distintos em função do tipo de matriz, grau de dispersão das argilas, o teor e o tipo de tratamento das argilas. Houve formação de nanocompósitos para poliamida 12 modificada com a argila I44P e de compósitos para poliamida 12 modificada com bentonitas. As propriedades reológicas confirmam o aumento das propriedades elásticas dos nanocompósitos devido à restrição a mobilidade macromolecular. A adição da montmorilonita organofilica comercial (I44P) promoveu o aumento da rigidez dos nanocompósitos sem perdas significativas da tenacidade.application/pdfporMatéria - PropriedadesNanocompósitos (Materiais)Nanocompósitos (Materiais) - Propriedades mecânicasPoliamidaPoliamida 12Propriedades reológicasPropriedades mecânicasMontmorilonitaMatterRheological propertiesMechanical propertiesPolyamide 12MontmorilloniteNanocompositeCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAPropriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonitainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisPós-Graduação em Ciência e Engenharia de Materiaisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSTEXTCRISTIANE_RAMOS_SANTOS.pdf.txtCRISTIANE_RAMOS_SANTOS.pdf.txtExtracted texttext/plain179305https://ri.ufs.br/jspui/bitstream/riufs/3516/2/CRISTIANE_RAMOS_SANTOS.pdf.txtd553ceef8836276fb839b8c9113f72daMD52THUMBNAILCRISTIANE_RAMOS_SANTOS.pdf.jpgCRISTIANE_RAMOS_SANTOS.pdf.jpgGenerated Thumbnailimage/jpeg1254https://ri.ufs.br/jspui/bitstream/riufs/3516/3/CRISTIANE_RAMOS_SANTOS.pdf.jpgfd8a3e6f1828520d8c15d169c9bf5343MD53ORIGINALCRISTIANE_RAMOS_SANTOS.pdfapplication/pdf4933843https://ri.ufs.br/jspui/bitstream/riufs/3516/1/CRISTIANE_RAMOS_SANTOS.pdf6b300625a7c2af92dd921e7d63ad9d2cMD51riufs/35162017-11-27 21:31:09.54oai:ufs.br:riufs/3516Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2017-11-28T00:31:09Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.por.fl_str_mv Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
title Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
spellingShingle Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
Santos, Cristiane Ramos dos
Matéria - Propriedades
Nanocompósitos (Materiais)
Nanocompósitos (Materiais) - Propriedades mecânicas
Poliamida
Poliamida 12
Propriedades reológicas
Propriedades mecânicas
Montmorilonita
Matter
Rheological properties
Mechanical properties
Polyamide 12
Montmorillonite
Nanocomposite
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
title_short Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
title_full Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
title_fullStr Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
title_full_unstemmed Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
title_sort Propriedades reológicas e mecânicas de compósitos e nanocompósitos poliamida 12 e montmorilonita
author Santos, Cristiane Ramos dos
author_facet Santos, Cristiane Ramos dos
author_role author
dc.contributor.author.fl_str_mv Santos, Cristiane Ramos dos
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/6216349050353010
dc.contributor.advisor1.fl_str_mv Batista, Wilton Walter
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/7798074244872034
contributor_str_mv Batista, Wilton Walter
dc.subject.por.fl_str_mv Matéria - Propriedades
Nanocompósitos (Materiais)
Nanocompósitos (Materiais) - Propriedades mecânicas
Poliamida
Poliamida 12
Propriedades reológicas
Propriedades mecânicas
Montmorilonita
topic Matéria - Propriedades
Nanocompósitos (Materiais)
Nanocompósitos (Materiais) - Propriedades mecânicas
Poliamida
Poliamida 12
Propriedades reológicas
Propriedades mecânicas
Montmorilonita
Matter
Rheological properties
Mechanical properties
Polyamide 12
Montmorillonite
Nanocomposite
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
dc.subject.eng.fl_str_mv Matter
Rheological properties
Mechanical properties
Polyamide 12
Montmorillonite
Nanocomposite
dc.subject.cnpq.fl_str_mv CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
description This work studied the rheological and mechanical properties of polyamide 12 modified montmorillonite clays and bentonita (the organo-modified commercial montmorillonite and a bentonite modified by various routes. Two polyamides 12 were used for the polyamide matrix, a virgin and another reprocessed. The polyamide 12 reprocessed was derived from tailings lines of fluid transport in automotive vehicles. Ten different compositions were prepared in single-screw extruder, and subsequently molded test specimens by injection. For formulations reprocessed polyamide 12, were added 5 to 7 wt.% of a commercial organo-modified montmorillonite ( I44P ) and the virgin polyamide 12 , 3 and 5 wt.%. For virgin polyamide matrix, also formulations were studied with 3 and 5% by weight of bentonite treated with Agent Titanate. The nanocomposite structure formation was evaluated by X-ray diffraction. For all developed formulations, mechanical and rheological tests, and their results were correlated performed: polyamide matrices, the content and the treatments of the clays. Clay dispersion and morphology of the fracture surface were analyzed by SEM. The analysis results showed distinct mechanical and rheological behaviors depending on the type of matrix, the degree of dispersion of clay, content and type of treatment of clays. There was formation of nanocomposites for polyamide 12 modified with I44P clay and composites for polyamide 12 modified bentonite. The rheological properties confirm the increase of the elastic properties of the nanocomposites due to the restriction to macromolecular mobility. The addition of organophilic commercial montmorillonite (I44P) promoted the increased stiffness of the nanocomposites without significant loss of toughness.
publishDate 2014
dc.date.issued.fl_str_mv 2014-04-30
dc.date.accessioned.fl_str_mv 2017-09-26T12:02:01Z
dc.date.available.fl_str_mv 2017-09-26T12:02:01Z
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