Thermal behavior of alginic acid and its sodium salt

Detalhes bibliográficos
Autor(a) principal: Soares,J. P.
Data de Publicação: 2004
Outros Autores: Santos,J. E., Chierice,G. O., Cavalheiro,E. T. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Eclética Química
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009
Resumo: An evaluation of hydration and thermal decomposition of HAlg and its sodium salt is described using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG curves in N2 and air, were obtained for alginic acid showed two decomposition steps attributed to loss of water and polymer decomposition respectively. The sodium alginate decomposed in three steps. The first attributed to water loss, followed by the formation of a carbonaceous residue and finally the Na2CO3. DSC curves presented peaks in agreement with the TG data. In the IR alginic acid presented bands at 1730 and 1631 cm-1, while sodium alginate presented a doublet at 1614 e 1431 cm-1, evidencing the presence of salified carboxyl groups.
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spelling Thermal behavior of alginic acid and its sodium saltalginic acidthermogravimetrydifferential scanning calorimetryAn evaluation of hydration and thermal decomposition of HAlg and its sodium salt is described using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG curves in N2 and air, were obtained for alginic acid showed two decomposition steps attributed to loss of water and polymer decomposition respectively. The sodium alginate decomposed in three steps. The first attributed to water loss, followed by the formation of a carbonaceous residue and finally the Na2CO3. DSC curves presented peaks in agreement with the TG data. In the IR alginic acid presented bands at 1730 and 1631 cm-1, while sodium alginate presented a doublet at 1614 e 1431 cm-1, evidencing the presence of salified carboxyl groups.Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP2004-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009Eclética Química v.29 n.2 2004reponame:Eclética Químicainstname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)instacron:UNESP10.1590/S0100-46702004000200009info:eu-repo/semantics/openAccessSoares,J. P.Santos,J. E.Chierice,G. O.Cavalheiro,E. T. G.eng2005-01-17T00:00:00Zoai:scielo:S0100-46702004000200009Revistahttp://revista.iq.unesp.br/ojs/index.php/ecletica/PUBhttps://revista.iq.unesp.br/ojs/index.php/ecletica/oaiecletica@ctrlk.com.br||ecletica@iq.unesp.br1678-46181678-4618opendoar:2005-01-17T00:00Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)false
dc.title.none.fl_str_mv Thermal behavior of alginic acid and its sodium salt
title Thermal behavior of alginic acid and its sodium salt
spellingShingle Thermal behavior of alginic acid and its sodium salt
Soares,J. P.
alginic acid
thermogravimetry
differential scanning calorimetry
title_short Thermal behavior of alginic acid and its sodium salt
title_full Thermal behavior of alginic acid and its sodium salt
title_fullStr Thermal behavior of alginic acid and its sodium salt
title_full_unstemmed Thermal behavior of alginic acid and its sodium salt
title_sort Thermal behavior of alginic acid and its sodium salt
author Soares,J. P.
author_facet Soares,J. P.
Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
author_role author
author2 Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
author2_role author
author
author
dc.contributor.author.fl_str_mv Soares,J. P.
Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
dc.subject.por.fl_str_mv alginic acid
thermogravimetry
differential scanning calorimetry
topic alginic acid
thermogravimetry
differential scanning calorimetry
description An evaluation of hydration and thermal decomposition of HAlg and its sodium salt is described using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG curves in N2 and air, were obtained for alginic acid showed two decomposition steps attributed to loss of water and polymer decomposition respectively. The sodium alginate decomposed in three steps. The first attributed to water loss, followed by the formation of a carbonaceous residue and finally the Na2CO3. DSC curves presented peaks in agreement with the TG data. In the IR alginic acid presented bands at 1730 and 1631 cm-1, while sodium alginate presented a doublet at 1614 e 1431 cm-1, evidencing the presence of salified carboxyl groups.
publishDate 2004
dc.date.none.fl_str_mv 2004-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-46702004000200009
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 Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP
publisher.none.fl_str_mv Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP
dc.source.none.fl_str_mv Eclética Química v.29 n.2 2004
reponame:Eclética Química
instname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Eclética Química
collection Eclética Química
repository.name.fl_str_mv Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
repository.mail.fl_str_mv ecletica@ctrlk.com.br||ecletica@iq.unesp.br
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