Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties

Detalhes bibliográficos
Autor(a) principal: Silva,B. J. B.
Data de Publicação: 2020
Outros Autores: Melo,A. C. S., Silva,D. S., Sousa,L. V., Quintela,P. H. L., Alencar,S. L., Silva,A. O. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000400379
Resumo: Abstract The thermo-catalytic degradation of polyethylene (PE) and ultra-high molecular weight polyethylene (UHMWPE) was studied in the presence of zeolites (ZSM-5, ZSM-22, and ferrierite) with different pore systems and textural properties. The zeolites were physically mixed with polymers in the proportion of 30 wt% and submitted to thermogravimetric analysis at heating rates of 5, 10, 20, and 30 °C.min-1. The activation energy of the degradation process was determined using the Flynn-Wall-Ozawa method. The addition of zeolites to polymers has considerably reduced the temperature of degradation. ZSM-22 demonstrated greater efficiency in the degradation of PE because it has a smaller crystallite size, promoting a shorter diffusional path for the polymer fragments coming from the surface. Ferrierite showed a lower energy level in the degradation of UHMWPE, showing the need for synergy between the accessibility of the structure and acidity of the catalyst to promote the cracking of this polymer.
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spelling Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural propertiesthermo-catalytic degradationpolymerszeoliteFlynn-Wall-Ozawa methodAbstract The thermo-catalytic degradation of polyethylene (PE) and ultra-high molecular weight polyethylene (UHMWPE) was studied in the presence of zeolites (ZSM-5, ZSM-22, and ferrierite) with different pore systems and textural properties. The zeolites were physically mixed with polymers in the proportion of 30 wt% and submitted to thermogravimetric analysis at heating rates of 5, 10, 20, and 30 °C.min-1. The activation energy of the degradation process was determined using the Flynn-Wall-Ozawa method. The addition of zeolites to polymers has considerably reduced the temperature of degradation. ZSM-22 demonstrated greater efficiency in the degradation of PE because it has a smaller crystallite size, promoting a shorter diffusional path for the polymer fragments coming from the surface. Ferrierite showed a lower energy level in the degradation of UHMWPE, showing the need for synergy between the accessibility of the structure and acidity of the catalyst to promote the cracking of this polymer.Associação Brasileira de Cerâmica2020-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000400379Cerâmica v.66 n.380 2020reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132020663802948info:eu-repo/semantics/openAccessSilva,B. J. B.Melo,A. C. S.Silva,D. S.Sousa,L. V.Quintela,P. H. L.Alencar,S. L.Silva,A. O. S.eng2020-11-03T00:00:00Zoai:scielo:S0366-69132020000400379Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2020-11-03T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
title Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
spellingShingle Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
Silva,B. J. B.
thermo-catalytic degradation
polymers
zeolite
Flynn-Wall-Ozawa method
title_short Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
title_full Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
title_fullStr Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
title_full_unstemmed Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
title_sort Thermo-catalytic degradation of PE and UHMWPE over zeolites with different pore systems and textural properties
author Silva,B. J. B.
author_facet Silva,B. J. B.
Melo,A. C. S.
Silva,D. S.
Sousa,L. V.
Quintela,P. H. L.
Alencar,S. L.
Silva,A. O. S.
author_role author
author2 Melo,A. C. S.
Silva,D. S.
Sousa,L. V.
Quintela,P. H. L.
Alencar,S. L.
Silva,A. O. S.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Silva,B. J. B.
Melo,A. C. S.
Silva,D. S.
Sousa,L. V.
Quintela,P. H. L.
Alencar,S. L.
Silva,A. O. S.
dc.subject.por.fl_str_mv thermo-catalytic degradation
polymers
zeolite
Flynn-Wall-Ozawa method
topic thermo-catalytic degradation
polymers
zeolite
Flynn-Wall-Ozawa method
description Abstract The thermo-catalytic degradation of polyethylene (PE) and ultra-high molecular weight polyethylene (UHMWPE) was studied in the presence of zeolites (ZSM-5, ZSM-22, and ferrierite) with different pore systems and textural properties. The zeolites were physically mixed with polymers in the proportion of 30 wt% and submitted to thermogravimetric analysis at heating rates of 5, 10, 20, and 30 °C.min-1. The activation energy of the degradation process was determined using the Flynn-Wall-Ozawa method. The addition of zeolites to polymers has considerably reduced the temperature of degradation. ZSM-22 demonstrated greater efficiency in the degradation of PE because it has a smaller crystallite size, promoting a shorter diffusional path for the polymer fragments coming from the surface. Ferrierite showed a lower energy level in the degradation of UHMWPE, showing the need for synergy between the accessibility of the structure and acidity of the catalyst to promote the cracking of this polymer.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-01
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=S0366-69132020000400379
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000400379
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0366-69132020663802948
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 Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.66 n.380 2020
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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