Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples

Detalhes bibliográficos
Autor(a) principal: Martins, R. S.
Data de Publicação: 2011
Outros Autores: Silva, Marco Aurélio Pinto, Carneiro, O. S., Rocha, J. G., Nóbrega, J. M., Carvalho, Helder, Lanceros-Méndez, S.
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/14422
Resumo: Poly(vinylidene fluoride), PVDF, in its polar β-phase, is known to possess strong piezoelectric properties, among polymers. The α phase of PVDF is the most stable phase when the polymer crystallizes from the melt. In this way, the electroactive phase of the material is commonly obtained by inducing the α to β phase transformation through mechanical stretching at a given temperature, being the stretch ratio and temperature the most important parameters influencing the phase transformation [1]. Further, it has been demonstrated that the electroactive response of the material strongly depends on the β-phase and therefore on the processing conditions [2]. In the present work, the effect of processing variables in the content of β-phase PVDF extruded tape, namely the stretching ratio and process temperatures, was studied. For comparison purposes the produced samples were uniaxially stretched with ratios of up to 6, in the extrusion line (in-line) and in a tensile tester (off-line), at both 80ºC and 120ºC. The β-phase content was analysed by Fourier transform infrared spectroscopy (FTIR) and the electroactive phase content was correlated to the electroactive response of the material, obtained through the measurement of the d33 piezoelectric coefficient. The results obtained allowed to identify the most important parameters influencing the amount of the β-phase content and will be used as guidance for the development of a large scale production process for multilayer products with piezoelectric properties.
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spelling Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samplesPVDFPiezoelectricExtrusionTapeElectroactivePoly(vinylidene fluoride), PVDF, in its polar β-phase, is known to possess strong piezoelectric properties, among polymers. The α phase of PVDF is the most stable phase when the polymer crystallizes from the melt. In this way, the electroactive phase of the material is commonly obtained by inducing the α to β phase transformation through mechanical stretching at a given temperature, being the stretch ratio and temperature the most important parameters influencing the phase transformation [1]. Further, it has been demonstrated that the electroactive response of the material strongly depends on the β-phase and therefore on the processing conditions [2]. In the present work, the effect of processing variables in the content of β-phase PVDF extruded tape, namely the stretching ratio and process temperatures, was studied. For comparison purposes the produced samples were uniaxially stretched with ratios of up to 6, in the extrusion line (in-line) and in a tensile tester (off-line), at both 80ºC and 120ºC. The β-phase content was analysed by Fourier transform infrared spectroscopy (FTIR) and the electroactive phase content was correlated to the electroactive response of the material, obtained through the measurement of the d33 piezoelectric coefficient. The results obtained allowed to identify the most important parameters influencing the amount of the β-phase content and will be used as guidance for the development of a large scale production process for multilayer products with piezoelectric properties.FCT- Portuguese Foundation for Science and Technology through the project PTDC/CTM/108801/2008 and FEDER via FCT, Fundação para a Ciência e Tecnologia, under the POCI 2010 and Pluriannual programsUniversidade do MinhoMartins, R. S.Silva, Marco Aurélio PintoCarneiro, O. S.Rocha, J. G.Nóbrega, J. M.Carvalho, HelderLanceros-Méndez, S.2011-042011-04-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/14422enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-11T06:39:24Zoai:repositorium.sdum.uminho.pt:1822/14422Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T06:39:24Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
title Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
spellingShingle Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
Martins, R. S.
PVDF
Piezoelectric
Extrusion
Tape
Electroactive
title_short Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
title_full Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
title_fullStr Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
title_full_unstemmed Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
title_sort Electroactive tape extrusion : influence of processing conditions on the β-phase content of PVDF samples
author Martins, R. S.
author_facet Martins, R. S.
Silva, Marco Aurélio Pinto
Carneiro, O. S.
Rocha, J. G.
Nóbrega, J. M.
Carvalho, Helder
Lanceros-Méndez, S.
author_role author
author2 Silva, Marco Aurélio Pinto
Carneiro, O. S.
Rocha, J. G.
Nóbrega, J. M.
Carvalho, Helder
Lanceros-Méndez, S.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Martins, R. S.
Silva, Marco Aurélio Pinto
Carneiro, O. S.
Rocha, J. G.
Nóbrega, J. M.
Carvalho, Helder
Lanceros-Méndez, S.
dc.subject.por.fl_str_mv PVDF
Piezoelectric
Extrusion
Tape
Electroactive
topic PVDF
Piezoelectric
Extrusion
Tape
Electroactive
description Poly(vinylidene fluoride), PVDF, in its polar β-phase, is known to possess strong piezoelectric properties, among polymers. The α phase of PVDF is the most stable phase when the polymer crystallizes from the melt. In this way, the electroactive phase of the material is commonly obtained by inducing the α to β phase transformation through mechanical stretching at a given temperature, being the stretch ratio and temperature the most important parameters influencing the phase transformation [1]. Further, it has been demonstrated that the electroactive response of the material strongly depends on the β-phase and therefore on the processing conditions [2]. In the present work, the effect of processing variables in the content of β-phase PVDF extruded tape, namely the stretching ratio and process temperatures, was studied. For comparison purposes the produced samples were uniaxially stretched with ratios of up to 6, in the extrusion line (in-line) and in a tensile tester (off-line), at both 80ºC and 120ºC. The β-phase content was analysed by Fourier transform infrared spectroscopy (FTIR) and the electroactive phase content was correlated to the electroactive response of the material, obtained through the measurement of the d33 piezoelectric coefficient. The results obtained allowed to identify the most important parameters influencing the amount of the β-phase content and will be used as guidance for the development of a large scale production process for multilayer products with piezoelectric properties.
publishDate 2011
dc.date.none.fl_str_mv 2011-04
2011-04-01T00:00:00Z
dc.type.driver.fl_str_mv conference paper
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/14422
url http://hdl.handle.net/1822/14422
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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