Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
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=S0104-14282022000200407 |
Resumo: | Abstract The structure and properties of semi-crystalline polymers can be drastically tailored by extensional flows. In this work, polypropylene (PP), Polyvinylidene fluoride (PVDF) and Low Density Polyethylene (LDPE) were melt extruded through a sequence of rings designed to apply controlled extensional flows in the polymer melts. The effects of extensional flow on the structure and properties of the extruded filaments were then evaluated by mechanical tensile tests, dynamic-mechanical analysis (DMA) and Differential Scanning Calorimetry (DSC). The DMA and tensile tests revealed a significant increase in terms of static and dynamic moduli for the polymers extruded through the extensional flow device. PP, PVDF and LDPE had their dynamic moduli enhanced 19%, 40% and 77%, respectively. These results were ascribed to the enhancement in crystallinity and orientation degree of the polymer chains induced by the extensional flow. The crystallinity was increased around 9% for PP, PVDF and LDPE extruded under extensional conditions. |
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Polímeros (São Carlos. Online) |
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Impact of controlled extensional flow during extrusion of PP, PVDF and LDPEextensional flowextrusionsemi-crystalline polymerscrystallinity increaseAbstract The structure and properties of semi-crystalline polymers can be drastically tailored by extensional flows. In this work, polypropylene (PP), Polyvinylidene fluoride (PVDF) and Low Density Polyethylene (LDPE) were melt extruded through a sequence of rings designed to apply controlled extensional flows in the polymer melts. The effects of extensional flow on the structure and properties of the extruded filaments were then evaluated by mechanical tensile tests, dynamic-mechanical analysis (DMA) and Differential Scanning Calorimetry (DSC). The DMA and tensile tests revealed a significant increase in terms of static and dynamic moduli for the polymers extruded through the extensional flow device. PP, PVDF and LDPE had their dynamic moduli enhanced 19%, 40% and 77%, respectively. These results were ascribed to the enhancement in crystallinity and orientation degree of the polymer chains induced by the extensional flow. The crystallinity was increased around 9% for PP, PVDF and LDPE extruded under extensional conditions.Associação Brasileira de Polímeros2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282022000200407Polímeros v.32 n.2 2022reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/0104-1428.20210085info:eu-repo/semantics/openAccessGoes,Marcel Andrey deSantos,João Paulo FerreiraCarvalho,Benjamim de Meloeng2022-09-20T00:00:00Zoai:scielo:S0104-14282022000200407Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2022-09-20T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false |
dc.title.none.fl_str_mv |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
title |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
spellingShingle |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE Goes,Marcel Andrey de extensional flow extrusion semi-crystalline polymers crystallinity increase |
title_short |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
title_full |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
title_fullStr |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
title_full_unstemmed |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
title_sort |
Impact of controlled extensional flow during extrusion of PP, PVDF and LDPE |
author |
Goes,Marcel Andrey de |
author_facet |
Goes,Marcel Andrey de Santos,João Paulo Ferreira Carvalho,Benjamim de Melo |
author_role |
author |
author2 |
Santos,João Paulo Ferreira Carvalho,Benjamim de Melo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Goes,Marcel Andrey de Santos,João Paulo Ferreira Carvalho,Benjamim de Melo |
dc.subject.por.fl_str_mv |
extensional flow extrusion semi-crystalline polymers crystallinity increase |
topic |
extensional flow extrusion semi-crystalline polymers crystallinity increase |
description |
Abstract The structure and properties of semi-crystalline polymers can be drastically tailored by extensional flows. In this work, polypropylene (PP), Polyvinylidene fluoride (PVDF) and Low Density Polyethylene (LDPE) were melt extruded through a sequence of rings designed to apply controlled extensional flows in the polymer melts. The effects of extensional flow on the structure and properties of the extruded filaments were then evaluated by mechanical tensile tests, dynamic-mechanical analysis (DMA) and Differential Scanning Calorimetry (DSC). The DMA and tensile tests revealed a significant increase in terms of static and dynamic moduli for the polymers extruded through the extensional flow device. PP, PVDF and LDPE had their dynamic moduli enhanced 19%, 40% and 77%, respectively. These results were ascribed to the enhancement in crystallinity and orientation degree of the polymer chains induced by the extensional flow. The crystallinity was increased around 9% for PP, PVDF and LDPE extruded under extensional conditions. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
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=S0104-14282022000200407 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282022000200407 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-1428.20210085 |
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.32 n.2 2022 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 |
_version_ |
1754212591384657920 |