Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400009 |
Resumo: | Samples of polypropylene (PP) and low-density polyethylene (LDPE) were submitted to ultraviolet radiation, in the natural environment and also in the laboratory. Chemical modifications were quantified by the carbonyl index (CI), mechanical properties and melt flow index. The degradation in the laboratory was comparatively faster than in the environment for both types of polymers. The accelerating factor was determined for the various properties investigated. This parameter, however, showed a large variation with the degradation criteria and the type of polymer. The existence of a "universal accelerating factor", therefore, was not observed in the current study. |
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Avaliação da fotodegradação de poliolefinas através de exposição natural e artificialpolypropylenelow-density polyethylenephotodegradationSamples of polypropylene (PP) and low-density polyethylene (LDPE) were submitted to ultraviolet radiation, in the natural environment and also in the laboratory. Chemical modifications were quantified by the carbonyl index (CI), mechanical properties and melt flow index. The degradation in the laboratory was comparatively faster than in the environment for both types of polymers. The accelerating factor was determined for the various properties investigated. This parameter, however, showed a large variation with the degradation criteria and the type of polymer. The existence of a "universal accelerating factor", therefore, was not observed in the current study.Sociedade Brasileira de Química2006-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400009Química Nova v.29 n.4 2006reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422006000400009info:eu-repo/semantics/openAccessFechine,Guilhermino José MacêdoSantos,João Antônio Belmino dosRabello,Marcelo Silveirapor2006-07-31T00:00:00Zoai:scielo:S0100-40422006000400009Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2006-07-31T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
title |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
spellingShingle |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial Fechine,Guilhermino José Macêdo polypropylene low-density polyethylene photodegradation |
title_short |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
title_full |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
title_fullStr |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
title_full_unstemmed |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
title_sort |
Avaliação da fotodegradação de poliolefinas através de exposição natural e artificial |
author |
Fechine,Guilhermino José Macêdo |
author_facet |
Fechine,Guilhermino José Macêdo Santos,João Antônio Belmino dos Rabello,Marcelo Silveira |
author_role |
author |
author2 |
Santos,João Antônio Belmino dos Rabello,Marcelo Silveira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fechine,Guilhermino José Macêdo Santos,João Antônio Belmino dos Rabello,Marcelo Silveira |
dc.subject.por.fl_str_mv |
polypropylene low-density polyethylene photodegradation |
topic |
polypropylene low-density polyethylene photodegradation |
description |
Samples of polypropylene (PP) and low-density polyethylene (LDPE) were submitted to ultraviolet radiation, in the natural environment and also in the laboratory. Chemical modifications were quantified by the carbonyl index (CI), mechanical properties and melt flow index. The degradation in the laboratory was comparatively faster than in the environment for both types of polymers. The accelerating factor was determined for the various properties investigated. This parameter, however, showed a large variation with the degradation criteria and the type of polymer. The existence of a "universal accelerating factor", therefore, was not observed in the current study. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-07-01 |
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=S0100-40422006000400009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400009 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.1590/S0100-40422006000400009 |
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 |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Química Nova v.29 n.4 2006 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318105358237696 |