Photothermal characterization of low density polyethylene food packages

Detalhes bibliográficos
Autor(a) principal: Poley,Luiz H.
Data de Publicação: 2004
Outros Autores: Siqueira,Ana P. L., Silva,Marcelo G. da, Vargas,Helion, Sanchez,Rubén
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Polímeros (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000100007
Resumo: The present work discuss the applicability of photothermal techniques for determining diffusion coefficients of oxygen and carbon dioxide of commercial low-density polyethylene (LDPE). The methodology involves the monitoring of diffused gas by a photoacoustic analyzer. Diffusion coefficients measured for CO2 and O2 were 2.77 x 10-8 cm²/s and 1.68 x 10-7 cm²/s, respectively. To support the gas diffusion results, thermal properties were studied using photoacoustic spectroscopy and crystallinity was determined using X-ray diffraction. Values obtained for thermal diffusivity and specific heat capacity were 1.65 x 10-3cm²/s and 2.33 J.cm-3K-1, which are in good agreement with values available in the literature for pure LDPE and thus assure reliability of diffusion coefficients values.
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spelling Photothermal characterization of low density polyethylene food packagesPhotoacoustic spectroscopyLDPEdiffusion coefficientsThe present work discuss the applicability of photothermal techniques for determining diffusion coefficients of oxygen and carbon dioxide of commercial low-density polyethylene (LDPE). The methodology involves the monitoring of diffused gas by a photoacoustic analyzer. Diffusion coefficients measured for CO2 and O2 were 2.77 x 10-8 cm²/s and 1.68 x 10-7 cm²/s, respectively. To support the gas diffusion results, thermal properties were studied using photoacoustic spectroscopy and crystallinity was determined using X-ray diffraction. Values obtained for thermal diffusivity and specific heat capacity were 1.65 x 10-3cm²/s and 2.33 J.cm-3K-1, which are in good agreement with values available in the literature for pure LDPE and thus assure reliability of diffusion coefficients values.Associação Brasileira de Polímeros2004-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000100007Polímeros v.14 n.1 2004reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/S0104-14282004000100007info:eu-repo/semantics/openAccessPoley,Luiz H.Siqueira,Ana P. L.Silva,Marcelo G. daVargas,HelionSanchez,Rubéneng2004-05-13T00:00:00Zoai:scielo:S0104-14282004000100007Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2004-05-13T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false
dc.title.none.fl_str_mv Photothermal characterization of low density polyethylene food packages
title Photothermal characterization of low density polyethylene food packages
spellingShingle Photothermal characterization of low density polyethylene food packages
Poley,Luiz H.
Photoacoustic spectroscopy
LDPE
diffusion coefficients
title_short Photothermal characterization of low density polyethylene food packages
title_full Photothermal characterization of low density polyethylene food packages
title_fullStr Photothermal characterization of low density polyethylene food packages
title_full_unstemmed Photothermal characterization of low density polyethylene food packages
title_sort Photothermal characterization of low density polyethylene food packages
author Poley,Luiz H.
author_facet Poley,Luiz H.
Siqueira,Ana P. L.
Silva,Marcelo G. da
Vargas,Helion
Sanchez,Rubén
author_role author
author2 Siqueira,Ana P. L.
Silva,Marcelo G. da
Vargas,Helion
Sanchez,Rubén
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Poley,Luiz H.
Siqueira,Ana P. L.
Silva,Marcelo G. da
Vargas,Helion
Sanchez,Rubén
dc.subject.por.fl_str_mv Photoacoustic spectroscopy
LDPE
diffusion coefficients
topic Photoacoustic spectroscopy
LDPE
diffusion coefficients
description The present work discuss the applicability of photothermal techniques for determining diffusion coefficients of oxygen and carbon dioxide of commercial low-density polyethylene (LDPE). The methodology involves the monitoring of diffused gas by a photoacoustic analyzer. Diffusion coefficients measured for CO2 and O2 were 2.77 x 10-8 cm²/s and 1.68 x 10-7 cm²/s, respectively. To support the gas diffusion results, thermal properties were studied using photoacoustic spectroscopy and crystallinity was determined using X-ray diffraction. Values obtained for thermal diffusivity and specific heat capacity were 1.65 x 10-3cm²/s and 2.33 J.cm-3K-1, which are in good agreement with values available in the literature for pure LDPE and thus assure reliability of diffusion coefficients values.
publishDate 2004
dc.date.none.fl_str_mv 2004-03-01
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=S0104-14282004000100007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000100007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-14282004000100007
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 Associação Brasileira de Polímeros
publisher.none.fl_str_mv Associação Brasileira de Polímeros
dc.source.none.fl_str_mv Polímeros v.14 n.1 2004
reponame:Polímeros (São Carlos. Online)
instname:Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
instname_str Associação Brasileira de Polímeros (ABPol)
instacron_str ABPO
institution ABPO
reponame_str Polímeros (São Carlos. Online)
collection Polímeros (São Carlos. Online)
repository.name.fl_str_mv Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)
repository.mail.fl_str_mv ||revista@abpol.org.br
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