Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UERJ |
Texto Completo: | http://www.bdtd.uerj.br/handle/1/7970 |
Resumo: | The use of polyethylene to produce pipes began in the 1950s, in North America, and since this time, it has been gaining market space, whether in the sanitation, oil and gas or mining industry. High-density polyethylene (HDPE) is the most used polyethylene grade for this application, because offers an excellent choice from both an economical and a technical point of view. However, despite its excellent properties, HDPE may have limited use time in many situations, depending on its area of application due to its low temperature resistance and contact with various fluids. The study of the ageing of this polymer in the different fluids becomes quite interesting, because the physical and chemical changes that can occur contribute to the reduction of the useful life of the parts in service. Knowing the different mechanisms that act on a polymeric material helps prevent and control the mode and time of failure. The objective of this work is the characterization of the High Density Polyethylene used in the production of pipelines, before and after aging, by the action of LUBRAX OB 440 oil, at room temperature and at 50 °C, during the time intervals of one, three, six and twelve weeks, respectively. The mechanical properties in tensile and impact mode were evaluated by using standard tests. The samples were also characterized by infrared spectroscopy (FTIR), melt flow index (MFI) determinations, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffraction (XRD), gravimetry and oil absorption determinations. The results showed that the temperature exerts a significant influence on the aging process of the polymer in the oil, since the mechanical properties of the HDPE aged at room temperature did not change during the immersion period. The samples submitted to aging at 50 ° C, however, showed an increase in the impact strength and a trend to decrease the modulus of elasticity. The results of the DSC tests of the aged samples showed that the samples submitted to the aging process in oil showed an increase in the crystallinity degree, regardless of the temperature used. This result was corroborated by the obtained XRD data. The thermogravimetric analysis, gravimetry and FTIR showed that the diffusion phenomenon of the oil in the sample is strongly influenced by temperature. The FTIR analyzis for samples aged at room temperature and at 50 ° C showed a peak at 1377 cm -1 corresponding to the diffusion of LUBRAX oil in the polymer matrix. Scanning electron microscopy of the samples showed that the most pronounced effect of aging ocurred at 50 ° C, with the presence of holes and regions with cracks in the micrographs. |
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Rocha, Marisa Cristina Guimarãeshttp://lattes.cnpq.br/5408802153017996D´almeida, José Roberto Moraeshttp://lattes.cnpq.br/1672274202055214Silva, Antonio Henrique Monteiro da Fonseca Thomé dahttp://lattes.cnpq.br/0460991389512568Oliveira, Carlos Ivan Ribeiro dehttp://lattes.cnpq.br/0396360065699279http://lattes.cnpq.br/0156543960937255Coelho, Natalia Nogueira2021-01-05T18:29:42Z2018-11-232018-08-24COELHO, Natalia Nogueira. Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD). 2018. 105 f. Dissertação (Mestrado em Materiais não-metálicos; Física e mecânica dos materiais) - Universidade do Estado do Rio de Janeiro, Nova Friburgo, 2018.http://www.bdtd.uerj.br/handle/1/7970The use of polyethylene to produce pipes began in the 1950s, in North America, and since this time, it has been gaining market space, whether in the sanitation, oil and gas or mining industry. High-density polyethylene (HDPE) is the most used polyethylene grade for this application, because offers an excellent choice from both an economical and a technical point of view. However, despite its excellent properties, HDPE may have limited use time in many situations, depending on its area of application due to its low temperature resistance and contact with various fluids. The study of the ageing of this polymer in the different fluids becomes quite interesting, because the physical and chemical changes that can occur contribute to the reduction of the useful life of the parts in service. Knowing the different mechanisms that act on a polymeric material helps prevent and control the mode and time of failure. The objective of this work is the characterization of the High Density Polyethylene used in the production of pipelines, before and after aging, by the action of LUBRAX OB 440 oil, at room temperature and at 50 °C, during the time intervals of one, three, six and twelve weeks, respectively. The mechanical properties in tensile and impact mode were evaluated by using standard tests. The samples were also characterized by infrared spectroscopy (FTIR), melt flow index (MFI) determinations, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffraction (XRD), gravimetry and oil absorption determinations. The results showed that the temperature exerts a significant influence on the aging process of the polymer in the oil, since the mechanical properties of the HDPE aged at room temperature did not change during the immersion period. The samples submitted to aging at 50 ° C, however, showed an increase in the impact strength and a trend to decrease the modulus of elasticity. The results of the DSC tests of the aged samples showed that the samples submitted to the aging process in oil showed an increase in the crystallinity degree, regardless of the temperature used. This result was corroborated by the obtained XRD data. The thermogravimetric analysis, gravimetry and FTIR showed that the diffusion phenomenon of the oil in the sample is strongly influenced by temperature. The FTIR analyzis for samples aged at room temperature and at 50 ° C showed a peak at 1377 cm -1 corresponding to the diffusion of LUBRAX oil in the polymer matrix. Scanning electron microscopy of the samples showed that the most pronounced effect of aging ocurred at 50 ° C, with the presence of holes and regions with cracks in the micrographs.O uso do polietileno como material de tubulação se deu a partir da década de 50 na América do Norte e desde então vem ganhando espaço no mercado. Entre os polietilenos utilizados, destaca-se o polietileno de alta densidade (PEAD). Apesar de suas excelentes propriedades, o PEAD pode ter seu tempo de uso limitado em muitas situações dependendo da sua área de aplicação. Conhecer os diferentes mecanismos que atuam sobre um material polimérico ajuda a prevenir e a controlar o modo e o momento de falha. O objetivo desse trabalho é a caracterização do Polietileno de Alta Densidade usado na fabricação de dutos, antes e após o envelhecimento, por ação do óleo LUBRAX OB 440, sob temperatura ambiente e na temperatura de 50°C, durante os intervalos de tempo de uma, três, seis e doze semanas. As propriedades mecânicas foram avaliadas através de ensaios mecânicos de tração e impacto. A caracterização das amostras também foi efetuada através de espectroscopia na região do infravermelho (FTIR), determinações de índice de fluidez (MFI), análise termogravimétrica (TGA), calorimetria diferencial de varredura (DSC), microscopia eletrônica de varredura (MEV), difração de raios-X (DRX), gravimetria e pela determinação da absorção de óleo pelas amostras durante o tempo de imersão. Os resultados obtidos demonstraram que a temperatura é uma variável que exerce influência significativa no processo de envelhecimento do polímero no óleo, visto que as propriedades mecânicas do PEAD envelhecido a temperatura ambiente, quase não sofreram variações durante o período de imersão. As amostras submetidas ao envelhecimento a 50°C, entretanto, apresentaram um aumento na resistência ao impacto e tendência a diminuição do módulo de elasticidade. O resultado dos ensaios de DSC das amostras envelhecidas mostrou que as amostras submetidas ao processo de envelhecimento em óleo apresentaram um aumento do índice de cristalinidade, independente da temperatura utilizada. Esse resultado foi corroborado pelo ensaio de DRX. A análise termogravimétrica, a gravimetria e o FTIR mostraram que o fenômeno de difusão do óleo na amostra é fortemente influenciado pela temperatura. As análises de FTIR para as amostras envelhecidas à temperatura ambiente e à temperatura de 50°C apresentaram um pico em 1377 cm-1 correspondente à difusão do óleo LUBRAX na matriz polimérica. A microscopia eletrônica de varredura do PEAD envelhecido, mostrou o efeito mais acentuado do envelhecimento a 50°C, com a presença de buracos e regiões com rachaduras.Submitted by Boris Flegr (boris@uerj.br) on 2021-01-05T18:29:42Z No. of bitstreams: 1 Dissertacao_NataliaNogueiraCoelhoErrata01.pdf: 9900975 bytes, checksum: b0fc43b3efd6dfad60dbbde7b7906f8a (MD5)Made available in DSpace on 2021-01-05T18:29:42Z (GMT). No. of bitstreams: 1 Dissertacao_NataliaNogueiraCoelhoErrata01.pdf: 9900975 bytes, checksum: b0fc43b3efd6dfad60dbbde7b7906f8a (MD5) Previous issue date: 2018-08-24Fundação Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiroapplication/pdfporUniversidade do Estado do Rio de JaneiroPrograma de Pós-Graduação em Ciência e Tecnologia de MateriaisUERJBRCentro de Tecnologia e Ciências::Instituto PolitécnicoHigh-density polyethylenePipesAgeingTemperatureOilDiffusionTubosDesgaste mecânicoTermoplásticos - Propriedades mecânicasCompósitos poliméricosPolietileno de alta densidadeEnvelhecimentoTemperaturaÓleo LUBRAX OB 440DifusãoCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAEstudo do envelhecimento de dutos de polietileno de alta densidade (PEAD)Study of ageing pipelines high density polyethylene (HDPE)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UERJinstname:Universidade do Estado do Rio de Janeiro (UERJ)instacron:UERJORIGINALDissertacao_NataliaNogueiraCoelhoErrata01.pdfapplication/pdf9900975http://www.bdtd.uerj.br/bitstream/1/7970/1/Dissertacao_NataliaNogueiraCoelhoErrata01.pdfb0fc43b3efd6dfad60dbbde7b7906f8aMD511/79702024-02-27 14:29:34.17oai:www.bdtd.uerj.br:1/7970Biblioteca Digital de Teses e Dissertaçõeshttp://www.bdtd.uerj.br/PUBhttps://www.bdtd.uerj.br:8443/oai/requestbdtd.suporte@uerj.bropendoar:29032024-02-27T17:29:34Biblioteca Digital de Teses e Dissertações da UERJ - Universidade do Estado do Rio de Janeiro (UERJ)false |
dc.title.por.fl_str_mv |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
dc.title.alternative.eng.fl_str_mv |
Study of ageing pipelines high density polyethylene (HDPE) |
title |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
spellingShingle |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) Coelho, Natalia Nogueira High-density polyethylene Pipes Ageing Temperature Oil Diffusion Tubos Desgaste mecânico Termoplásticos - Propriedades mecânicas Compósitos poliméricos Polietileno de alta densidade Envelhecimento Temperatura Óleo LUBRAX OB 440 Difusão CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
title_full |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
title_fullStr |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
title_full_unstemmed |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
title_sort |
Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD) |
author |
Coelho, Natalia Nogueira |
author_facet |
Coelho, Natalia Nogueira |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Rocha, Marisa Cristina Guimarães |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5408802153017996 |
dc.contributor.advisor-co1.fl_str_mv |
D´almeida, José Roberto Moraes |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/1672274202055214 |
dc.contributor.referee1.fl_str_mv |
Silva, Antonio Henrique Monteiro da Fonseca Thomé da |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/0460991389512568 |
dc.contributor.referee2.fl_str_mv |
Oliveira, Carlos Ivan Ribeiro de |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/0396360065699279 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0156543960937255 |
dc.contributor.author.fl_str_mv |
Coelho, Natalia Nogueira |
contributor_str_mv |
Rocha, Marisa Cristina Guimarães D´almeida, José Roberto Moraes Silva, Antonio Henrique Monteiro da Fonseca Thomé da Oliveira, Carlos Ivan Ribeiro de |
dc.subject.eng.fl_str_mv |
High-density polyethylene Pipes Ageing Temperature Oil Diffusion |
topic |
High-density polyethylene Pipes Ageing Temperature Oil Diffusion Tubos Desgaste mecânico Termoplásticos - Propriedades mecânicas Compósitos poliméricos Polietileno de alta densidade Envelhecimento Temperatura Óleo LUBRAX OB 440 Difusão CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.por.fl_str_mv |
Tubos Desgaste mecânico Termoplásticos - Propriedades mecânicas Compósitos poliméricos Polietileno de alta densidade Envelhecimento Temperatura Óleo LUBRAX OB 440 Difusão |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
The use of polyethylene to produce pipes began in the 1950s, in North America, and since this time, it has been gaining market space, whether in the sanitation, oil and gas or mining industry. High-density polyethylene (HDPE) is the most used polyethylene grade for this application, because offers an excellent choice from both an economical and a technical point of view. However, despite its excellent properties, HDPE may have limited use time in many situations, depending on its area of application due to its low temperature resistance and contact with various fluids. The study of the ageing of this polymer in the different fluids becomes quite interesting, because the physical and chemical changes that can occur contribute to the reduction of the useful life of the parts in service. Knowing the different mechanisms that act on a polymeric material helps prevent and control the mode and time of failure. The objective of this work is the characterization of the High Density Polyethylene used in the production of pipelines, before and after aging, by the action of LUBRAX OB 440 oil, at room temperature and at 50 °C, during the time intervals of one, three, six and twelve weeks, respectively. The mechanical properties in tensile and impact mode were evaluated by using standard tests. The samples were also characterized by infrared spectroscopy (FTIR), melt flow index (MFI) determinations, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffraction (XRD), gravimetry and oil absorption determinations. The results showed that the temperature exerts a significant influence on the aging process of the polymer in the oil, since the mechanical properties of the HDPE aged at room temperature did not change during the immersion period. The samples submitted to aging at 50 ° C, however, showed an increase in the impact strength and a trend to decrease the modulus of elasticity. The results of the DSC tests of the aged samples showed that the samples submitted to the aging process in oil showed an increase in the crystallinity degree, regardless of the temperature used. This result was corroborated by the obtained XRD data. The thermogravimetric analysis, gravimetry and FTIR showed that the diffusion phenomenon of the oil in the sample is strongly influenced by temperature. The FTIR analyzis for samples aged at room temperature and at 50 ° C showed a peak at 1377 cm -1 corresponding to the diffusion of LUBRAX oil in the polymer matrix. Scanning electron microscopy of the samples showed that the most pronounced effect of aging ocurred at 50 ° C, with the presence of holes and regions with cracks in the micrographs. |
publishDate |
2018 |
dc.date.available.fl_str_mv |
2018-11-23 |
dc.date.issued.fl_str_mv |
2018-08-24 |
dc.date.accessioned.fl_str_mv |
2021-01-05T18:29:42Z |
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 |
COELHO, Natalia Nogueira. Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD). 2018. 105 f. Dissertação (Mestrado em Materiais não-metálicos; Física e mecânica dos materiais) - Universidade do Estado do Rio de Janeiro, Nova Friburgo, 2018. |
dc.identifier.uri.fl_str_mv |
http://www.bdtd.uerj.br/handle/1/7970 |
identifier_str_mv |
COELHO, Natalia Nogueira. Estudo do envelhecimento de dutos de polietileno de alta densidade (PEAD). 2018. 105 f. Dissertação (Mestrado em Materiais não-metálicos; Física e mecânica dos materiais) - Universidade do Estado do Rio de Janeiro, Nova Friburgo, 2018. |
url |
http://www.bdtd.uerj.br/handle/1/7970 |
dc.language.iso.fl_str_mv |
por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade do Estado do Rio de Janeiro |
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Programa de Pós-Graduação em Ciência e Tecnologia de Materiais |
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UERJ |
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BR |
dc.publisher.department.fl_str_mv |
Centro de Tecnologia e Ciências::Instituto Politécnico |
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Universidade do Estado do Rio de Janeiro |
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Biblioteca Digital de Teses e Dissertações da UERJ |
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