Preparação de poliuretana à base de óleo de mamona

Detalhes bibliográficos
Autor(a) principal: Rodrigues, Jucélia Maria Emerenciano
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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spelling 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
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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.
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