The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB

Detalhes bibliográficos
Autor(a) principal: Pachekoski,Wagner Maurício
Data de Publicação: 2013
Outros Autores: Dalmolin,Carla, Agnelli,José Augusto Marcondes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000200009
Resumo: PHB was characterized after different industrial processes by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Melt Flow Index (MFI), Complex Dielectric Relaxation (CDR) and Size Exclusion Chromatography (SEC). Some properties of PHB were investigated before and after processing, in order to understand how temperature and other extrusion or injection conditions affect the polymer degradation. All the processed samples showed an increasing in the melt flow index, a decreasing of the dynamic crystallization temperature, and a reduction in the molar mass, suggesting some degradation. The molar mass reduction after processing, predicted when only thermal degradation is considered, was calculated in function of the kinetic parameters, such as constant thermal degradation and residence time during the industrial processing. It was found that the real molar mass reduction was higher than the theoretical value, indicating an important contribution of the shearing of polymeric chains during processing in the PHB degradation.
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spelling The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHBpoly(hydroxybutyrate)PHBbiodegradable polymerdegradationPHB was characterized after different industrial processes by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Melt Flow Index (MFI), Complex Dielectric Relaxation (CDR) and Size Exclusion Chromatography (SEC). Some properties of PHB were investigated before and after processing, in order to understand how temperature and other extrusion or injection conditions affect the polymer degradation. All the processed samples showed an increasing in the melt flow index, a decreasing of the dynamic crystallization temperature, and a reduction in the molar mass, suggesting some degradation. The molar mass reduction after processing, predicted when only thermal degradation is considered, was calculated in function of the kinetic parameters, such as constant thermal degradation and residence time during the industrial processing. It was found that the real molar mass reduction was higher than the theoretical value, indicating an important contribution of the shearing of polymeric chains during processing in the PHB degradation.ABM, ABC, ABPol2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000200009Materials Research v.16 n.2 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392012005000180info:eu-repo/semantics/openAccessPachekoski,Wagner MaurícioDalmolin,CarlaAgnelli,José Augusto Marcondeseng2013-03-19T00:00:00Zoai:scielo:S1516-14392013000200009Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-03-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
title The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
spellingShingle The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
Pachekoski,Wagner Maurício
poly(hydroxybutyrate)
PHB
biodegradable polymer
degradation
title_short The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
title_full The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
title_fullStr The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
title_full_unstemmed The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
title_sort The influence of the industrial processing on the degradation of poly(hidroxybutyrate) - PHB
author Pachekoski,Wagner Maurício
author_facet Pachekoski,Wagner Maurício
Dalmolin,Carla
Agnelli,José Augusto Marcondes
author_role author
author2 Dalmolin,Carla
Agnelli,José Augusto Marcondes
author2_role author
author
dc.contributor.author.fl_str_mv Pachekoski,Wagner Maurício
Dalmolin,Carla
Agnelli,José Augusto Marcondes
dc.subject.por.fl_str_mv poly(hydroxybutyrate)
PHB
biodegradable polymer
degradation
topic poly(hydroxybutyrate)
PHB
biodegradable polymer
degradation
description PHB was characterized after different industrial processes by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Melt Flow Index (MFI), Complex Dielectric Relaxation (CDR) and Size Exclusion Chromatography (SEC). Some properties of PHB were investigated before and after processing, in order to understand how temperature and other extrusion or injection conditions affect the polymer degradation. All the processed samples showed an increasing in the melt flow index, a decreasing of the dynamic crystallization temperature, and a reduction in the molar mass, suggesting some degradation. The molar mass reduction after processing, predicted when only thermal degradation is considered, was calculated in function of the kinetic parameters, such as constant thermal degradation and residence time during the industrial processing. It was found that the real molar mass reduction was higher than the theoretical value, indicating an important contribution of the shearing of polymeric chains during processing in the PHB degradation.
publishDate 2013
dc.date.none.fl_str_mv 2013-04-01
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=S1516-14392013000200009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000200009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392012005000180
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.16 n.2 2013
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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