Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
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=S1516-14392019000600232 |
Resumo: | High density polyethylene and high density polyethylene-clay nanocomposites were produced using direct solvent polymerization and a Ziegler catalyst system (TiCl4 and triethylaluminum in hexane). The produced polymer has a high average molecular weight and a multimodal molecular weight distribution composed of four distributions including a very high molecular weight component. The laboratory polymer has a thermal stability in inert atmosphere similar to the commercial high density polyethylene produced by Braskem. In oxidant atmosphere the produced polymer presents three thermal oxidation events above 400ºC due to the combustion of low, medium and high molecular weight molecules. The thermal oxidation of the nanocomposites is shifted and reduced for high temperatures indicating an improvement in the thermal stability of the polymeric matrix due to the clay barrier effect for gases and volatile compounds. |
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Materials research (São Carlos. Online) |
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Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent PolymerizationPolyethyleneNanocompositeThermal degradationClayIn situ polymerizationHigh density polyethylene and high density polyethylene-clay nanocomposites were produced using direct solvent polymerization and a Ziegler catalyst system (TiCl4 and triethylaluminum in hexane). The produced polymer has a high average molecular weight and a multimodal molecular weight distribution composed of four distributions including a very high molecular weight component. The laboratory polymer has a thermal stability in inert atmosphere similar to the commercial high density polyethylene produced by Braskem. In oxidant atmosphere the produced polymer presents three thermal oxidation events above 400ºC due to the combustion of low, medium and high molecular weight molecules. The thermal oxidation of the nanocomposites is shifted and reduced for high temperatures indicating an improvement in the thermal stability of the polymeric matrix due to the clay barrier effect for gases and volatile compounds.ABM, ABC, ABPol2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000600232Materials Research v.22 n.6 2019reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2019-0096info:eu-repo/semantics/openAccessAgrela,Sara Pereira deLima,Luiz Rogério Pinho de AndradeSouza,Rosemário Cerqueiraeng2020-03-06T00:00:00Zoai:scielo:S1516-14392019000600232Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2020-03-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
title |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
spellingShingle |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization Agrela,Sara Pereira de Polyethylene Nanocomposite Thermal degradation Clay In situ polymerization |
title_short |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
title_full |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
title_fullStr |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
title_full_unstemmed |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
title_sort |
Thermal Stability of High Density Polyethylene-Clay Nanocomposites Produced by in situ Solvent Polymerization |
author |
Agrela,Sara Pereira de |
author_facet |
Agrela,Sara Pereira de Lima,Luiz Rogério Pinho de Andrade Souza,Rosemário Cerqueira |
author_role |
author |
author2 |
Lima,Luiz Rogério Pinho de Andrade Souza,Rosemário Cerqueira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Agrela,Sara Pereira de Lima,Luiz Rogério Pinho de Andrade Souza,Rosemário Cerqueira |
dc.subject.por.fl_str_mv |
Polyethylene Nanocomposite Thermal degradation Clay In situ polymerization |
topic |
Polyethylene Nanocomposite Thermal degradation Clay In situ polymerization |
description |
High density polyethylene and high density polyethylene-clay nanocomposites were produced using direct solvent polymerization and a Ziegler catalyst system (TiCl4 and triethylaluminum in hexane). The produced polymer has a high average molecular weight and a multimodal molecular weight distribution composed of four distributions including a very high molecular weight component. The laboratory polymer has a thermal stability in inert atmosphere similar to the commercial high density polyethylene produced by Braskem. In oxidant atmosphere the produced polymer presents three thermal oxidation events above 400ºC due to the combustion of low, medium and high molecular weight molecules. The thermal oxidation of the nanocomposites is shifted and reduced for high temperatures indicating an improvement in the thermal stability of the polymeric matrix due to the clay barrier effect for gases and volatile compounds. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
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=S1516-14392019000600232 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000600232 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2019-0096 |
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.22 n.6 2019 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_ |
1754212675518201856 |