Preparação de poliuretana à base de óleo de mamona
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/15883 |
Resumo: | Polyurethanes are very versatile macromolecular materials that can be used in the form of powders, adhesives and elastomers. As a consequence, they constitute important subject for research as well as outstanding materials used in several manufacturing processes. In addition to the search for new polyurethanes, the kinetics control during its preparation is a very important topic, mainly if the polyurethane is obtained via bulk polymerization. The work in thesis was directed towards this subject, particularly the synthesis of polyurethanes based castor oil and isophorone diisocianate. As a first step castor oil characterized using the following analytical methods: iodine index, saponification index, refraction index, humidity content and infrared absorption spectroscopy (FTIR). As a second step, test specimens of these polyurethanes were obtained via bulk polymerization and were submitted to swelling experiments with different solvents. From these experiments, the Hildebrand parameter was determined for this material. Finally, bulk polymerization was carried out in a differential scanning calorimetry (DSC) equipment, using different heating rates, at two conditions: without catalyst and with dibutyltin dilaurate (DBTDL) as catalyst. The DSC curves were adjusted to a kinetic model, using the isoconversional method, indicating the autocatalytic effect characteristic of this class of polymerization reaction |
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Rodrigues, Jucélia Maria Emerencianohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760662A6http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783139Z0&dataRevisao=nullFonseca, José Luis Cardozohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788562T6Barbosa Sobrinho, Ariosvaldo Alveshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703687T7Pereira, Márcia Rodrigueshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788568T8Dantas, Tereza Neuma de Castro2014-12-17T15:01:46Z2006-08-212014-12-17T15:01:46Z2005-12-15RODRIGUES, Jucélia Maria Emerenciano. Preparação de poliuretana à base de óleo de mamona. 2005. 142 f. Tese (Doutorado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005.https://repositorio.ufrn.br/jspui/handle/123456789/15883Polyurethanes are very versatile macromolecular materials that can be used in the form of powders, adhesives and elastomers. As a consequence, they constitute important subject for research as well as outstanding materials used in several manufacturing processes. In addition to the search for new polyurethanes, the kinetics control during its preparation is a very important topic, mainly if the polyurethane is obtained via bulk polymerization. The work in thesis was directed towards this subject, particularly the synthesis of polyurethanes based castor oil and isophorone diisocianate. As a first step castor oil characterized using the following analytical methods: iodine index, saponification index, refraction index, humidity content and infrared absorption spectroscopy (FTIR). As a second step, test specimens of these polyurethanes were obtained via bulk polymerization and were submitted to swelling experiments with different solvents. From these experiments, the Hildebrand parameter was determined for this material. Finally, bulk polymerization was carried out in a differential scanning calorimetry (DSC) equipment, using different heating rates, at two conditions: without catalyst and with dibutyltin dilaurate (DBTDL) as catalyst. The DSC curves were adjusted to a kinetic model, using the isoconversional method, indicating the autocatalytic effect characteristic of this class of polymerization reactionPoliuretanas são polímeros de grande versatilidade, podendo ser usadas na forma de pós, adesivos ou elastômeros. Por este motivo, as poliuretanas são amplamente pesquisadas e utilizadas nas indústrias. Paralelamente à busca por novas poliuretanas, é importante o controle cinético durante sua obtenção, principalmente se estas são obtidas via polimerização em massa. O trabalho desta tese aborda este problema, especificamente no caso da obtenção de poliuretanas derivadas do óleo de mamona e diisocianato de isoforona. Para isto, primeiramente o óleo de mamona foi caracterizado através dos seguintes métodos analíticos: índice de iodo, índice de saponificação, índice de refração, índice de hidroxila, teor de umidade e espectroscopia de absorção na região do infravermelho (FTIR). Como segundo passo, os corpos de prova dessas poliuretanas foram obtidos através de polimerização em massa e submetidos a ensaios de inchamento com diferentes solventes. A partir destes ensaios o parâmetro de Hildebrand foi determinado para este material. Finalmente, a polimerização em massa desse material foi executada em equipamento de calorimetria exploratória diferencial (DSC) a diferentes taxas de aquecimento sob duas condições: sem catalisador e com o catalisador, dibutil-dilaurato de estanho (DBTDL). As curvas de DSC foram ajustadas a modelos cinéticos, usando o método isoconversional, caracterizando o caráter autocatalítico da formação de poliuretanasConselho Nacional de Desenvolvimento Científico e Tecnológicoapplication/pdfporUniversidade Federal do Rio Grande do NortePrograma de Pós-Graduação em Engenharia QuímicaUFRNBRPesquisa e Desenvolvimento de Tecnologias RegionaisPoliuretanasÓleo de mamonaCinética de polimerizaçãoPolyurethanesCastor oilPolymerization kinetics and DSCCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAPreparação de poliuretana à base de óleo de mamonainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALJuceliaMER.pdfapplication/pdf2171315https://repositorio.ufrn.br/bitstream/123456789/15883/1/JuceliaMER.pdf6d1b358ee82a3e95a8b3fb30782bdf76MD51TEXTJuceliaMER.pdf.txtJuceliaMER.pdf.txtExtracted texttext/plain209748https://repositorio.ufrn.br/bitstream/123456789/15883/6/JuceliaMER.pdf.txtee6dafa9d3327a23f935c72efc148431MD56THUMBNAILJuceliaMER.pdf.jpgJuceliaMER.pdf.jpgIM Thumbnailimage/jpeg3450https://repositorio.ufrn.br/bitstream/123456789/15883/7/JuceliaMER.pdf.jpg8d4ef4f9cdee33a5ee86cb14a0f260b3MD57123456789/158832017-11-02 05:02:36.921oai:https://repositorio.ufrn.br:123456789/15883Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2017-11-02T08:02:36Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.por.fl_str_mv |
Preparação de poliuretana à base de óleo de mamona |
title |
Preparação de poliuretana à base de óleo de mamona |
spellingShingle |
Preparação de poliuretana à base de óleo de mamona Rodrigues, Jucélia Maria Emerenciano Poliuretanas Óleo de mamona Cinética de polimerização Polyurethanes Castor oil Polymerization kinetics and DSC CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Preparação de poliuretana à base de óleo de mamona |
title_full |
Preparação de poliuretana à base de óleo de mamona |
title_fullStr |
Preparação de poliuretana à base de óleo de mamona |
title_full_unstemmed |
Preparação de poliuretana à base de óleo de mamona |
title_sort |
Preparação de poliuretana à base de óleo de mamona |
author |
Rodrigues, Jucélia Maria Emerenciano |
author_facet |
Rodrigues, Jucélia Maria Emerenciano |
author_role |
author |
dc.contributor.authorID.por.fl_str_mv |
|
dc.contributor.authorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760662A6 |
dc.contributor.advisorID.por.fl_str_mv |
|
dc.contributor.advisorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783139Z0&dataRevisao=null |
dc.contributor.advisor-co1ID.por.fl_str_mv |
|
dc.contributor.referees1.pt_BR.fl_str_mv |
Barbosa Sobrinho, Ariosvaldo Alves |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703687T7 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Pereira, Márcia Rodrigues |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788568T8 |
dc.contributor.author.fl_str_mv |
Rodrigues, Jucélia Maria Emerenciano |
dc.contributor.advisor-co1.fl_str_mv |
Fonseca, José Luis Cardozo |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788562T6 |
dc.contributor.advisor1.fl_str_mv |
Dantas, Tereza Neuma de Castro |
contributor_str_mv |
Fonseca, José Luis Cardozo Dantas, Tereza Neuma de Castro |
dc.subject.por.fl_str_mv |
Poliuretanas Óleo de mamona Cinética de polimerização |
topic |
Poliuretanas Óleo de mamona Cinética de polimerização Polyurethanes Castor oil Polymerization kinetics and DSC CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Polyurethanes Castor oil Polymerization kinetics and DSC |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Polyurethanes are very versatile macromolecular materials that can be used in the form of powders, adhesives and elastomers. As a consequence, they constitute important subject for research as well as outstanding materials used in several manufacturing processes. In addition to the search for new polyurethanes, the kinetics control during its preparation is a very important topic, mainly if the polyurethane is obtained via bulk polymerization. The work in thesis was directed towards this subject, particularly the synthesis of polyurethanes based castor oil and isophorone diisocianate. As a first step castor oil characterized using the following analytical methods: iodine index, saponification index, refraction index, humidity content and infrared absorption spectroscopy (FTIR). As a second step, test specimens of these polyurethanes were obtained via bulk polymerization and were submitted to swelling experiments with different solvents. From these experiments, the Hildebrand parameter was determined for this material. Finally, bulk polymerization was carried out in a differential scanning calorimetry (DSC) equipment, using different heating rates, at two conditions: without catalyst and with dibutyltin dilaurate (DBTDL) as catalyst. The DSC curves were adjusted to a kinetic model, using the isoconversional method, indicating the autocatalytic effect characteristic of this class of polymerization reaction |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005-12-15 |
dc.date.available.fl_str_mv |
2006-08-21 2014-12-17T15:01:46Z |
dc.date.accessioned.fl_str_mv |
2014-12-17T15:01:46Z |
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 |
RODRIGUES, Jucélia Maria Emerenciano. Preparação de poliuretana à base de óleo de mamona. 2005. 142 f. Tese (Doutorado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/15883 |
identifier_str_mv |
RODRIGUES, Jucélia Maria Emerenciano. Preparação de poliuretana à base de óleo de mamona. 2005. 142 f. Tese (Doutorado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005. |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/15883 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal do Rio Grande do Norte |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Química |
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UFRN |
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BR |
dc.publisher.department.fl_str_mv |
Pesquisa e Desenvolvimento de Tecnologias Regionais |
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Universidade Federal do Rio Grande do Norte |
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Repositório Institucional da UFRN |
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