Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation

Detalhes bibliográficos
Autor(a) principal: Rios,Rachel R.V.A.
Data de Publicação: 2006
Outros Autores: Gontijo,Manuela, Ferraz,Vany P., Lago,Rochel M., Araujo,Maria Helena
Tipo de documento: Relatório
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300027
Resumo: This work describes the devulcanization of vulcanized SBR (Styrene Butadiene Rubber) based on controlled oxidation with nitric acid. IR, ¹H and 13C-NMR, CHN elemental analyses, TG, GPC and TPD-MS (Temperature Programmed Decomposition-Mass Spectrometry) experiments suggest that nitric acid promotes two processes: (i) devulcanization by oxidation of the sulfide crosslinks and (ii) oxidation of the carbon framework leading to the formation of -COOH and -NO2 groups. Under aggressive conditions (HNO3, reflux) the polymer chain is strongly oxidized and fragmented to a highly oxygenated low molecular weight fraction, which is soluble in water.
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spelling Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidationdevulcanizationHNO3oxidationThis work describes the devulcanization of vulcanized SBR (Styrene Butadiene Rubber) based on controlled oxidation with nitric acid. IR, ¹H and 13C-NMR, CHN elemental analyses, TG, GPC and TPD-MS (Temperature Programmed Decomposition-Mass Spectrometry) experiments suggest that nitric acid promotes two processes: (i) devulcanization by oxidation of the sulfide crosslinks and (ii) oxidation of the carbon framework leading to the formation of -COOH and -NO2 groups. Under aggressive conditions (HNO3, reflux) the polymer chain is strongly oxidized and fragmented to a highly oxygenated low molecular weight fraction, which is soluble in water.Sociedade Brasileira de Química2006-06-01info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300027Journal of the Brazilian Chemical Society v.17 n.3 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000300027info:eu-repo/semantics/openAccessRios,Rachel R.V.A.Gontijo,ManuelaFerraz,Vany P.Lago,Rochel M.Araujo,Maria Helenaeng2006-05-25T00:00:00Zoai:scielo:S0103-50532006000300027Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-05-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
title Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
spellingShingle Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
Rios,Rachel R.V.A.
devulcanization
HNO3
oxidation
title_short Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
title_full Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
title_fullStr Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
title_full_unstemmed Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
title_sort Devulcanization of styrenebutadiene (SBR) waste tire by controlled oxidation
author Rios,Rachel R.V.A.
author_facet Rios,Rachel R.V.A.
Gontijo,Manuela
Ferraz,Vany P.
Lago,Rochel M.
Araujo,Maria Helena
author_role author
author2 Gontijo,Manuela
Ferraz,Vany P.
Lago,Rochel M.
Araujo,Maria Helena
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rios,Rachel R.V.A.
Gontijo,Manuela
Ferraz,Vany P.
Lago,Rochel M.
Araujo,Maria Helena
dc.subject.por.fl_str_mv devulcanization
HNO3
oxidation
topic devulcanization
HNO3
oxidation
description This work describes the devulcanization of vulcanized SBR (Styrene Butadiene Rubber) based on controlled oxidation with nitric acid. IR, ¹H and 13C-NMR, CHN elemental analyses, TG, GPC and TPD-MS (Temperature Programmed Decomposition-Mass Spectrometry) experiments suggest that nitric acid promotes two processes: (i) devulcanization by oxidation of the sulfide crosslinks and (ii) oxidation of the carbon framework leading to the formation of -COOH and -NO2 groups. Under aggressive conditions (HNO3, reflux) the polymer chain is strongly oxidized and fragmented to a highly oxygenated low molecular weight fraction, which is soluble in water.
publishDate 2006
dc.date.none.fl_str_mv 2006-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/report
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format report
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300027
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300027
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532006000300027
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.17 n.3 2006
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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