COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do UNICENTRO |
Texto Completo: | http://tede.unicentro.br:8080/jspui/handle/jspui/1364 |
Resumo: | The use of reinforcement from cellulosic fibers in composites is advantageous when compared to inorganic materials, because they have a lower density, are less abrasive and less expensive, and present themselves as a raw material from renewable resources. The objective of this study was to evaluate the influence of the bleached and unbleached cellulosic pulp obtained by the chemical process, mechanical process pulp and wood-flour, of Pinus taeda as reinforcement in low density polyethylene (LDPE) matrix, virgin and recycled, together with a maleic anhydride coupling agent, in the properties of wood-plastic composites. The composites were produced by extrusion and the specimens molded by compression. The samples were characterized by thermal analysis (TGA and DTG), density, mechanical properties and scanning electron microscopy (SEM). It was found that when the pulp and flour were incorporated into the matrix the composites mechanical properties were improved. Thermal analysis showed that the addition of reinforcement to the matrix reduced the rate of material degradation. It was found that all reinforcement types acted as nucleating agents because the composites had better mechanical properties than pure LDPE. In this study, the tensile strength and flexural strength was influenced by all parameters studied and the interactions were significant. In general, the highest values of strength and stiffness were obtained with the use of thermo-mechanical process pulp as reinforcement and the lowest values with the use of unbleached chemical process pulp. Photomicrographs analysis showed that the coupling agent was effective for compatibilizing the reinforcement with the matrix in the composites. It was possible to produce composite materials with good physico-mechanical properties and improved thermal stability. |
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Hillig, Évertonhttp://lattes.cnpq.br/5240619272740210Miyahara, Ricardo Yoshimitsuhttp://lattes.cnpq.br/4732577960462037074.366.529-58http://lattes.cnpq.br/8535723341988383Lima, Érick Afonso Agnes de2021-02-24T12:06:07Z2018-03-07Lima, Érick Afonso Agnes de. COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA. 2018. 70 f. Dissertação (Programa de Pós-Graduação em Ciências Florestais - Mestrado) - Universidade Estadual do Centro-Oeste, Irati-PR.http://tede.unicentro.br:8080/jspui/handle/jspui/1364The use of reinforcement from cellulosic fibers in composites is advantageous when compared to inorganic materials, because they have a lower density, are less abrasive and less expensive, and present themselves as a raw material from renewable resources. The objective of this study was to evaluate the influence of the bleached and unbleached cellulosic pulp obtained by the chemical process, mechanical process pulp and wood-flour, of Pinus taeda as reinforcement in low density polyethylene (LDPE) matrix, virgin and recycled, together with a maleic anhydride coupling agent, in the properties of wood-plastic composites. The composites were produced by extrusion and the specimens molded by compression. The samples were characterized by thermal analysis (TGA and DTG), density, mechanical properties and scanning electron microscopy (SEM). It was found that when the pulp and flour were incorporated into the matrix the composites mechanical properties were improved. Thermal analysis showed that the addition of reinforcement to the matrix reduced the rate of material degradation. It was found that all reinforcement types acted as nucleating agents because the composites had better mechanical properties than pure LDPE. In this study, the tensile strength and flexural strength was influenced by all parameters studied and the interactions were significant. In general, the highest values of strength and stiffness were obtained with the use of thermo-mechanical process pulp as reinforcement and the lowest values with the use of unbleached chemical process pulp. Photomicrographs analysis showed that the coupling agent was effective for compatibilizing the reinforcement with the matrix in the composites. It was possible to produce composite materials with good physico-mechanical properties and improved thermal stability.A utilização de reforço proveniente de fibras vegetais em compósitos é vantajosa quando comparada aos materiais inorgânicos, por apresentarem menor densidade, serem menos abrasivos e menos onerosos, além de se apresentarem como uma matéria-prima proveniente de recursos renováveis. O objetivo desse estudo foi avaliar a influência do uso de polpa celulósica obtida por processo químico, branqueada e não-branqueada, de polpa obtida por processo mecânico e de farinha de madeira de Pinus taeda como reforço em matriz polietileno de baixa densidade (LDPE), virgem e reciclado, juntamente com um agente de acoplamento de anidrido maleico, nas propriedades de compósitos madeira-plástico. Os compósitos foram produzidos por extrusão e os corpos de prova moldados por compressão. As amostras foram caracterizadas por análise térmica (TGA e DTG), densidade, propriedades mecânicas e microscopia eletrônica de varredura (MEV). Verificou-se que quando as polpas e a farinha foram incorporadas na matriz as propriedades mecânicas dos compósitos foram melhoradas. A análise térmica mostrou que a adição de reforço à matriz reduziu a velocidade de degradação do material. Verificou-se que todos os tipos de reforço agiram como agentes nucleantes, porque os compósitos apresentavam melhores propriedades mecânicas do que o LDPE puro. Nesse estudo, a tensão na força máxima de tração e de flexão foi influenciada por todos os parâmetros estudados e as interações foram significativas. Em geral, os maiores valores de resistência e rigidez foram obtidos com o uso da polpa de processo termo-mecânico como reforço e os menores valores com o uso da polpa de processo químico, não branqueada. A análise das fotomicrografias mostrou que o agente de acoplamento foi eficaz para compatibilização do reforço com a matriz nos compósitos. Foi possível produzir materiais compósitos com boas propriedades físico-mecânicas e estabilidade térmica melhorada.Submitted by Fabiano Jucá (fjuca@unicentro.br) on 2021-02-24T12:06:07Z No. of bitstreams: 1 Dissertação Érick Afonso Agnes de Lima.pdf: 2630609 bytes, checksum: 43562abdec4196705f002daa98b72b02 (MD5)Made available in DSpace on 2021-02-24T12:06:07Z (GMT). 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dc.title.por.fl_str_mv |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
title |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
spellingShingle |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA Lima, Érick Afonso Agnes de LDPE Polpas celulósicas Farinha de madeira LDPE Cellulosic pulps Wood-flour CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::MANEJO FLORESTAL |
title_short |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
title_full |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
title_fullStr |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
title_full_unstemmed |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
title_sort |
COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA |
author |
Lima, Érick Afonso Agnes de |
author_facet |
Lima, Érick Afonso Agnes de |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Hillig, Éverton |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5240619272740210 |
dc.contributor.advisor-co1.fl_str_mv |
Miyahara, Ricardo Yoshimitsu |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/4732577960462037 |
dc.contributor.authorID.fl_str_mv |
074.366.529-58 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/8535723341988383 |
dc.contributor.author.fl_str_mv |
Lima, Érick Afonso Agnes de |
contributor_str_mv |
Hillig, Éverton Miyahara, Ricardo Yoshimitsu |
dc.subject.por.fl_str_mv |
LDPE Polpas celulósicas Farinha de madeira |
topic |
LDPE Polpas celulósicas Farinha de madeira LDPE Cellulosic pulps Wood-flour CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::MANEJO FLORESTAL |
dc.subject.eng.fl_str_mv |
LDPE Cellulosic pulps Wood-flour |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::MANEJO FLORESTAL |
description |
The use of reinforcement from cellulosic fibers in composites is advantageous when compared to inorganic materials, because they have a lower density, are less abrasive and less expensive, and present themselves as a raw material from renewable resources. The objective of this study was to evaluate the influence of the bleached and unbleached cellulosic pulp obtained by the chemical process, mechanical process pulp and wood-flour, of Pinus taeda as reinforcement in low density polyethylene (LDPE) matrix, virgin and recycled, together with a maleic anhydride coupling agent, in the properties of wood-plastic composites. The composites were produced by extrusion and the specimens molded by compression. The samples were characterized by thermal analysis (TGA and DTG), density, mechanical properties and scanning electron microscopy (SEM). It was found that when the pulp and flour were incorporated into the matrix the composites mechanical properties were improved. Thermal analysis showed that the addition of reinforcement to the matrix reduced the rate of material degradation. It was found that all reinforcement types acted as nucleating agents because the composites had better mechanical properties than pure LDPE. In this study, the tensile strength and flexural strength was influenced by all parameters studied and the interactions were significant. In general, the highest values of strength and stiffness were obtained with the use of thermo-mechanical process pulp as reinforcement and the lowest values with the use of unbleached chemical process pulp. Photomicrographs analysis showed that the coupling agent was effective for compatibilizing the reinforcement with the matrix in the composites. It was possible to produce composite materials with good physico-mechanical properties and improved thermal stability. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-03-07 |
dc.date.accessioned.fl_str_mv |
2021-02-24T12:06:07Z |
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 |
Lima, Érick Afonso Agnes de. COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA. 2018. 70 f. Dissertação (Programa de Pós-Graduação em Ciências Florestais - Mestrado) - Universidade Estadual do Centro-Oeste, Irati-PR. |
dc.identifier.uri.fl_str_mv |
http://tede.unicentro.br:8080/jspui/handle/jspui/1364 |
identifier_str_mv |
Lima, Érick Afonso Agnes de. COMPÓSITOS POLIMÉRICOS REFORÇADOS COM POLPA DE MADEIRA. 2018. 70 f. Dissertação (Programa de Pós-Graduação em Ciências Florestais - Mestrado) - Universidade Estadual do Centro-Oeste, Irati-PR. |
url |
http://tede.unicentro.br:8080/jspui/handle/jspui/1364 |
dc.language.iso.fl_str_mv |
por |
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por |
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6065515305966967648 |
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600 500 600 600 600 |
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2075167498588264571 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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dc.publisher.none.fl_str_mv |
Universidade Estadual do Centro-Oeste |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciências Florestais (Mestrado) |
dc.publisher.initials.fl_str_mv |
UNICENTRO |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Unicentro::Departamento de Ciências Florestais |
publisher.none.fl_str_mv |
Universidade Estadual do Centro-Oeste |
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