Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | http://repositorio.unifesp.br/handle/11600/8633 http://dx.doi.org/10.1590/0104-1428.1623 |
Resumo: | In this work, polyarylacetylene (PAA) prepolymer obtained from 1,4-diethynylbenzene was evaluated as polymeric precursor of monolithic vitreous carbon (MVC). The monomer 1,4-diethynylbenzene was synthesized and the PAA prepolymer was prepared with 13, 16 and 19 wt % of nickel catalyst. The best percentage of nickel catalyst considered was 13 wt %, due to the lower molecular weight and polydispersity index and higher carbon yield. The traditional production of MVC is obtained from phenolic and poly(furfuryl alcohol) resins, which require many hours to pyrolyze due to the large quantity of gases generated. Furthermore, the porosity is hard to control using these conventional resins. Polyarylacetylene releases little volatiles due to the polyaddition reaction and the aromatic rings in PAA chain also provide a high thermal stability, therefore the heat treatment could be faster without cracking the carbon material. This would also lower the cost of fabrication of MVC, in addition to the low porosity observed, making this polymer a good matrix for MVC. |
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Oishi, Silvia SizukaBotelho, Edson CocchieriLuscombe, Christine KeikoRezende, Mirabel Cerqueira [UNIFESP]Universidade Estadual Paulista (UNESP)University of Washington Department of Materials Science and EngineeringUniversidade Federal de São Paulo (UNIFESP)2015-06-14T13:47:20Z2015-06-14T13:47:20Z2014-10-01Polímeros. Associação Brasileira de Polímeros, v. 24, n. 5, p. 541-546, 2014.0104-1428http://repositorio.unifesp.br/handle/11600/8633http://dx.doi.org/10.1590/0104-1428.1623S0104-14282014000500004.pdfS0104-1428201400050000410.1590/0104-1428.1623In this work, polyarylacetylene (PAA) prepolymer obtained from 1,4-diethynylbenzene was evaluated as polymeric precursor of monolithic vitreous carbon (MVC). The monomer 1,4-diethynylbenzene was synthesized and the PAA prepolymer was prepared with 13, 16 and 19 wt % of nickel catalyst. The best percentage of nickel catalyst considered was 13 wt %, due to the lower molecular weight and polydispersity index and higher carbon yield. The traditional production of MVC is obtained from phenolic and poly(furfuryl alcohol) resins, which require many hours to pyrolyze due to the large quantity of gases generated. Furthermore, the porosity is hard to control using these conventional resins. Polyarylacetylene releases little volatiles due to the polyaddition reaction and the aromatic rings in PAA chain also provide a high thermal stability, therefore the heat treatment could be faster without cracking the carbon material. This would also lower the cost of fabrication of MVC, in addition to the low porosity observed, making this polymer a good matrix for MVC.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista Faculdade de Engenharia de GuaratinguetáUniversity of Washington Department of Materials Science and EngineeringUniversidade Federal de São Paulo (UNIFESP) Instituto de Ciência e TecnologiaUNIFESP, Instituto de Ciência e TecnologiaSciELO541-546engAssociação Brasileira de PolímerosPolímerosPolyarylacetylene1,4-diethynylbenzenemonolithic vitreous carbonporositySynthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALS0104-14282014000500004.pdfapplication/pdf3767388${dspace.ui.url}/bitstream/11600/8633/1/S0104-14282014000500004.pdf2bf4d599352b7bf860a29f089205d642MD51open accessTEXTS0104-14282014000500004.pdf.txtS0104-14282014000500004.pdf.txtExtracted texttext/plain22013${dspace.ui.url}/bitstream/11600/8633/9/S0104-14282014000500004.pdf.txt6bdb1c19c82c7bc92cc92c3703359235MD59open accessTHUMBNAILS0104-14282014000500004.pdf.jpgS0104-14282014000500004.pdf.jpgIM Thumbnailimage/jpeg7850${dspace.ui.url}/bitstream/11600/8633/11/S0104-14282014000500004.pdf.jpgebf4400599a613dc39db2cf9c2217a76MD511open access11600/86332023-06-05 19:08:37.2open accessoai:repositorio.unifesp.br:11600/8633Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:08:37Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
title |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
spellingShingle |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing Oishi, Silvia Sizuka Polyarylacetylene 1,4-diethynylbenzene monolithic vitreous carbon porosity |
title_short |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
title_full |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
title_fullStr |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
title_full_unstemmed |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
title_sort |
Synthesis and characterization of polyarylacetylene for use in the monolithic vitreous carbon processing |
author |
Oishi, Silvia Sizuka |
author_facet |
Oishi, Silvia Sizuka Botelho, Edson Cocchieri Luscombe, Christine Keiko Rezende, Mirabel Cerqueira [UNIFESP] |
author_role |
author |
author2 |
Botelho, Edson Cocchieri Luscombe, Christine Keiko Rezende, Mirabel Cerqueira [UNIFESP] |
author2_role |
author author author |
dc.contributor.institution.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) University of Washington Department of Materials Science and Engineering Universidade Federal de São Paulo (UNIFESP) |
dc.contributor.author.fl_str_mv |
Oishi, Silvia Sizuka Botelho, Edson Cocchieri Luscombe, Christine Keiko Rezende, Mirabel Cerqueira [UNIFESP] |
dc.subject.eng.fl_str_mv |
Polyarylacetylene 1,4-diethynylbenzene monolithic vitreous carbon porosity |
topic |
Polyarylacetylene 1,4-diethynylbenzene monolithic vitreous carbon porosity |
description |
In this work, polyarylacetylene (PAA) prepolymer obtained from 1,4-diethynylbenzene was evaluated as polymeric precursor of monolithic vitreous carbon (MVC). The monomer 1,4-diethynylbenzene was synthesized and the PAA prepolymer was prepared with 13, 16 and 19 wt % of nickel catalyst. The best percentage of nickel catalyst considered was 13 wt %, due to the lower molecular weight and polydispersity index and higher carbon yield. The traditional production of MVC is obtained from phenolic and poly(furfuryl alcohol) resins, which require many hours to pyrolyze due to the large quantity of gases generated. Furthermore, the porosity is hard to control using these conventional resins. Polyarylacetylene releases little volatiles due to the polyaddition reaction and the aromatic rings in PAA chain also provide a high thermal stability, therefore the heat treatment could be faster without cracking the carbon material. This would also lower the cost of fabrication of MVC, in addition to the low porosity observed, making this polymer a good matrix for MVC. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-10-01 |
dc.date.accessioned.fl_str_mv |
2015-06-14T13:47:20Z |
dc.date.available.fl_str_mv |
2015-06-14T13:47:20Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
Polímeros. Associação Brasileira de Polímeros, v. 24, n. 5, p. 541-546, 2014. |
dc.identifier.uri.fl_str_mv |
http://repositorio.unifesp.br/handle/11600/8633 http://dx.doi.org/10.1590/0104-1428.1623 |
dc.identifier.issn.none.fl_str_mv |
0104-1428 |
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S0104-14282014000500004.pdf |
dc.identifier.scielo.none.fl_str_mv |
S0104-14282014000500004 |
dc.identifier.doi.none.fl_str_mv |
10.1590/0104-1428.1623 |
identifier_str_mv |
Polímeros. Associação Brasileira de Polímeros, v. 24, n. 5, p. 541-546, 2014. 0104-1428 S0104-14282014000500004.pdf S0104-14282014000500004 10.1590/0104-1428.1623 |
url |
http://repositorio.unifesp.br/handle/11600/8633 http://dx.doi.org/10.1590/0104-1428.1623 |
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Associação Brasileira de Polímeros |
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Associação Brasileira de Polímeros |
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