Effect of phosphoric acid on chemical transformations during Nomex pyrolysis

The thermal degradation of Nomex [poly(m-phenylene isophthalamide)] impregnated with phosphoric acid has been investigated by the analysis of the corresponding pyrolysis products, which were fractionated into gases, liquids, and char. Gas chromatography (GC) and/or gas chromatography/mass spectromet...

Descripción completa

Detalles Bibliográficos
Autores: Suárez García, Fabián, Villar Rodil, Silvia, Gutiérrez Blanco, Carlos, Martínez Alonso, Amelia, Díez Tascón, Juan Manuel
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2004
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/415088
Acceso en línea:http://hdl.handle.net/10261/415088
https://api.elsevier.com/content/abstract/scopus_id/3042653269
Access Level:acceso abierto
Palabra clave:http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
id ES_7da1d527f78fb7bf0e46378ef0ff2bba
oai_identifier_str oai:digital.csic.es:10261/415088
network_acronym_str ES
network_name_str España
repository_id_str
spelling Effect of phosphoric acid on chemical transformations during Nomex pyrolysisSuárez García, FabiánVillar Rodil, SilviaGutiérrez Blanco, CarlosMartínez Alonso, AmeliaDíez Tascón, Juan Manuelhttp://metadata.un.org/sdg/9http://metadata.un.org/sdg/7Ensure access to affordable, reliable, sustainable and modern energy for allBuild resilient infrastructure, promote inclusive and sustainable industrialization and foster innovationThe thermal degradation of Nomex [poly(m-phenylene isophthalamide)] impregnated with phosphoric acid has been investigated by the analysis of the corresponding pyrolysis products, which were fractionated into gases, liquids, and char. Gas chromatography (GC) and/or gas chromatography/mass spectrometry (GC/MS) were used to study the volatiles evolved whereas the solid residue was examined by elemental analysis and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). For the sake of comparison, a parallel study of unimpregnated Nomex was carried out in the same conditions. The main product of unimpregnated Nomex degradation in the conditions of this work was found to be m-benzenediamine, which is the result of a heterolytic process. Aromatic nitriles are also produced through homolytic reactions. Most of the products of impregnated Nomex degradation were also detected with its unimpregnated counterpart, except for isophthalic acid, carbon monoxide, and elemental phosphorus. Aromatic nitriles are the pre-eminent products from pyrolysis of unimpregnated Nomex, there being no trace of m-benzenediamine. Reaction mechanisms for impregnated Nomex degradation consistent with these findings are proposed, including a nonhomolytic process for the formation of nitriles in the presence of phosphoric acid.Financial support from MCYT (Project BQU2001-2936-C02-02) is gratefully acknowledged.Peer reviewedAmerican Chemical SocietyMinisterio de Ciencia y Tecnología (España)Suárez García, Fabián [0000-0002-1970-293X]Villar Rodil, Silvia [0000-0002-5832-9971]Martínez Alonso, Amelia [0000-0002-7183-0859]Díez Tascón, Juan Manuel [0000-0001-9219-7266]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262004info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/415088https://api.elsevier.com/content/abstract/scopus_id/3042653269reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MCYT//BQU2001-2936-C02-02Chemistry of Materialshttps://doi.org/10.1021/cm0349654Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4150882026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
title Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
spellingShingle Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
Suárez García, Fabián
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
title_short Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
title_full Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
title_fullStr Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
title_full_unstemmed Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
title_sort Effect of phosphoric acid on chemical transformations during Nomex pyrolysis
dc.creator.none.fl_str_mv Suárez García, Fabián
Villar Rodil, Silvia
Gutiérrez Blanco, Carlos
Martínez Alonso, Amelia
Díez Tascón, Juan Manuel
author Suárez García, Fabián
author_facet Suárez García, Fabián
Villar Rodil, Silvia
Gutiérrez Blanco, Carlos
Martínez Alonso, Amelia
Díez Tascón, Juan Manuel
author_role author
author2 Villar Rodil, Silvia
Gutiérrez Blanco, Carlos
Martínez Alonso, Amelia
Díez Tascón, Juan Manuel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia y Tecnología (España)
Suárez García, Fabián [0000-0002-1970-293X]
Villar Rodil, Silvia [0000-0002-5832-9971]
Martínez Alonso, Amelia [0000-0002-7183-0859]
Díez Tascón, Juan Manuel [0000-0001-9219-7266]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
topic http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
description The thermal degradation of Nomex [poly(m-phenylene isophthalamide)] impregnated with phosphoric acid has been investigated by the analysis of the corresponding pyrolysis products, which were fractionated into gases, liquids, and char. Gas chromatography (GC) and/or gas chromatography/mass spectrometry (GC/MS) were used to study the volatiles evolved whereas the solid residue was examined by elemental analysis and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). For the sake of comparison, a parallel study of unimpregnated Nomex was carried out in the same conditions. The main product of unimpregnated Nomex degradation in the conditions of this work was found to be m-benzenediamine, which is the result of a heterolytic process. Aromatic nitriles are also produced through homolytic reactions. Most of the products of impregnated Nomex degradation were also detected with its unimpregnated counterpart, except for isophthalic acid, carbon monoxide, and elemental phosphorus. Aromatic nitriles are the pre-eminent products from pyrolysis of unimpregnated Nomex, there being no trace of m-benzenediamine. Reaction mechanisms for impregnated Nomex degradation consistent with these findings are proposed, including a nonhomolytic process for the formation of nitriles in the presence of phosphoric acid.
publishDate 2004
dc.date.none.fl_str_mv 2004
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/415088
https://api.elsevier.com/content/abstract/scopus_id/3042653269
url http://hdl.handle.net/10261/415088
https://api.elsevier.com/content/abstract/scopus_id/3042653269
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MCYT//BQU2001-2936-C02-02
Chemistry of Materials
https://doi.org/10.1021/cm0349654
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411678182965248
score 15,81155

Similares en LA Referencia