Thermal behavior of alginic acid and its sodium salt

Thermal behavior of alginic acid and its sodium salt

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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Main Authors: Soares,J. P., Santos,J. E., Chierice,G. O., Cavalheiro,E. T. G.
Format: Digital revista
Language:English
Published: Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP 2004
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009
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spelling oai:scielo:S0100-467020040002000092005-01-17Thermal behavior of alginic acid and its sodium saltSoares,J. P.Santos,J. E.Chierice,G. O.Cavalheiro,E. T. G. alginic acid thermogravimetry differential scanning calorimetry 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.info:eu-repo/semantics/openAccessFundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESPEclética Química v.29 n.2 20042004-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009en10.1590/S0100-46702004000200009
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Soares,J. P.
Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
spellingShingle Soares,J. P.
Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
Thermal behavior of alginic acid and its sodium salt
author_facet Soares,J. P.
Santos,J. E.
Chierice,G. O.
Cavalheiro,E. T. G.
author_sort Soares,J. P.
title Thermal behavior of alginic acid and its sodium salt
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
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.
publisher Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP
publishDate 2004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009
work_keys_str_mv AT soaresjp thermalbehaviorofalginicacidanditssodiumsalt
AT santosje thermalbehaviorofalginicacidanditssodiumsalt
AT chiericego thermalbehaviorofalginicacidanditssodiumsalt
AT cavalheiroetg thermalbehaviorofalginicacidanditssodiumsalt
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