Influence of calcium carbonate nanoparticles on the crystallization of olypropylene

Detalhes bibliográficos
Autor(a) principal: Eiras,Daniel
Data de Publicação: 2009
Outros Autores: Pessan,Luiz Antonio
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=S1516-14392009000400024
Resumo: The aim of this work was to study the influence of calcium carbonate nanoparticles in crystallization process of polypropylene. Four compositions of PP/CaCO3 nanocomposites were prepared in a co-rotational twin screw extruder machine with calcium carbonate content of 3, 5, 7 and 10 wt. (%). The tests included SEM analyzes for calcium carbonate, differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) for the nanocomposites. The results showed an increase in PP crystallization temperature and crystallinity degree, and a reduction in spherullites size. The formation of PP β phase was confirmed by DSC and WAXD results. Finally from DSC analyses under isothermal conditions it was confirmed that calcium carbonate nanoparticles have a nucleation effect in polypropylene crystallization process by reducing the half crystallization time and increasing the kinetic constant (k).
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spelling Influence of calcium carbonate nanoparticles on the crystallization of olypropylenepolypropylenenanocompositescalcium carbonatecrystallizationThe aim of this work was to study the influence of calcium carbonate nanoparticles in crystallization process of polypropylene. Four compositions of PP/CaCO3 nanocomposites were prepared in a co-rotational twin screw extruder machine with calcium carbonate content of 3, 5, 7 and 10 wt. (%). The tests included SEM analyzes for calcium carbonate, differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) for the nanocomposites. The results showed an increase in PP crystallization temperature and crystallinity degree, and a reduction in spherullites size. The formation of PP β phase was confirmed by DSC and WAXD results. Finally from DSC analyses under isothermal conditions it was confirmed that calcium carbonate nanoparticles have a nucleation effect in polypropylene crystallization process by reducing the half crystallization time and increasing the kinetic constant (k).ABM, ABC, ABPol2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000400024Materials Research v.12 n.4 2009reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392009000400024info:eu-repo/semantics/openAccessEiras,DanielPessan,Luiz Antonioeng2010-01-29T00:00:00Zoai:scielo:S1516-14392009000400024Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2010-01-29T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
title Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
spellingShingle Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
Eiras,Daniel
polypropylene
nanocomposites
calcium carbonate
crystallization
title_short Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
title_full Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
title_fullStr Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
title_full_unstemmed Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
title_sort Influence of calcium carbonate nanoparticles on the crystallization of olypropylene
author Eiras,Daniel
author_facet Eiras,Daniel
Pessan,Luiz Antonio
author_role author
author2 Pessan,Luiz Antonio
author2_role author
dc.contributor.author.fl_str_mv Eiras,Daniel
Pessan,Luiz Antonio
dc.subject.por.fl_str_mv polypropylene
nanocomposites
calcium carbonate
crystallization
topic polypropylene
nanocomposites
calcium carbonate
crystallization
description The aim of this work was to study the influence of calcium carbonate nanoparticles in crystallization process of polypropylene. Four compositions of PP/CaCO3 nanocomposites were prepared in a co-rotational twin screw extruder machine with calcium carbonate content of 3, 5, 7 and 10 wt. (%). The tests included SEM analyzes for calcium carbonate, differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) for the nanocomposites. The results showed an increase in PP crystallization temperature and crystallinity degree, and a reduction in spherullites size. The formation of PP β phase was confirmed by DSC and WAXD results. Finally from DSC analyses under isothermal conditions it was confirmed that calcium carbonate nanoparticles have a nucleation effect in polypropylene crystallization process by reducing the half crystallization time and increasing the kinetic constant (k).
publishDate 2009
dc.date.none.fl_str_mv 2009-01-01
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=S1516-14392009000400024
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000400024
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392009000400024
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.12 n.4 2009
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
_version_ 1754212659344965632

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