Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films

Detalhes bibliográficos
Autor(a) principal: Nunes, J. Serrado
Data de Publicação: 2006
Outros Autores: Kouvatov, A., Mueller, V., Beige, H., Brandão, P. M., Belsley, M., Moreira, M. V., Lanceros-Méndez, S.
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/5173
Resumo: The phase diagram of the poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) copolymer system shows for VDF contents of 50...85 mol% a ferroelectric (FE)-paraelectric (PE) phase transition below melting temperature. Investigations on P(VDF-TrFE) 75/25 samples revealed a slight anisotropic behaviour, which leads to a strongly anisotropic stretching effect both on the phase transition and on the amount and nature of the FE phase in samples subjected to mechanical stretching along the main directions of the film. In this work, both the refractive index n1,2 and the piezoelectric coefficient d33 of mechanically stretched P(VDF-TrFE) have been measured for samples with different levels of permanent deformation. These parameters are found to reflect the anisotropy of the permanently deformed samples. The stretching effect is most pronounced (n1,2) or limited (d33) to the vicinity of the yielding point of the material. Above the yielding point, almost the piezoelectric d33 coefficient of the non-deformed sample is observed for samples with large permanent deformation.
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spelling Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer filmsPiezoelectricsPVDFFerroelectricsPolymersScience & TechnologyThe phase diagram of the poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) copolymer system shows for VDF contents of 50...85 mol% a ferroelectric (FE)-paraelectric (PE) phase transition below melting temperature. Investigations on P(VDF-TrFE) 75/25 samples revealed a slight anisotropic behaviour, which leads to a strongly anisotropic stretching effect both on the phase transition and on the amount and nature of the FE phase in samples subjected to mechanical stretching along the main directions of the film. In this work, both the refractive index n1,2 and the piezoelectric coefficient d33 of mechanically stretched P(VDF-TrFE) have been measured for samples with different levels of permanent deformation. These parameters are found to reflect the anisotropy of the permanently deformed samples. The stretching effect is most pronounced (n1,2) or limited (d33) to the vicinity of the yielding point of the material. Above the yielding point, almost the piezoelectric d33 coefficient of the non-deformed sample is observed for samples with large permanent deformation.Fundação para a Ciência e a Tecnologia (FCT) - Grants POCTI/CTM/33501/99, POCI/CTM/59425/2004.PIEZOTECH S.A.CRUP (AI-A-16/04).Trans Tech PublicationsUniversidade do MinhoNunes, J. SerradoKouvatov, A.Mueller, V.Beige, H.Brandão, P. M.Belsley, M.Moreira, M. V.Lanceros-Méndez, S.20062006-01-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/1822/5173engSerrado-Nunes, J., Kouvatov, A. Z., Müller, V., Beige, H., Brandão, P. M., Belsley, M., … Lanceros-Méndez, S. (2006, May 15). Piezoelectric and Optical Response of Uniaxially Stretched (VDF/TrFE) (75/25) Copolymer Films. Materials Science Forum. Trans Tech Publications, Ltd. http://doi.org/10.4028/www.scientific.net/msf.514-516.94597808784940260255-547610.4028/www.scientific.net/msf.514-516.945https://www.scientific.net/MSF.514-516.945info: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:RCAAP2024-09-07T01:27:49Zoai:repositorium.sdum.uminho.pt:1822/5173Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-09-07T01:27:49Repositório 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 Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
title Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
spellingShingle Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
Nunes, J. Serrado
Piezoelectrics
PVDF
Ferroelectrics
Polymers
Science & Technology
title_short Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
title_full Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
title_fullStr Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
title_full_unstemmed Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
title_sort Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
author Nunes, J. Serrado
author_facet Nunes, J. Serrado
Kouvatov, A.
Mueller, V.
Beige, H.
Brandão, P. M.
Belsley, M.
Moreira, M. V.
Lanceros-Méndez, S.
author_role author
author2 Kouvatov, A.
Mueller, V.
Beige, H.
Brandão, P. M.
Belsley, M.
Moreira, M. V.
Lanceros-Méndez, S.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Nunes, J. Serrado
Kouvatov, A.
Mueller, V.
Beige, H.
Brandão, P. M.
Belsley, M.
Moreira, M. V.
Lanceros-Méndez, S.
dc.subject.por.fl_str_mv Piezoelectrics
PVDF
Ferroelectrics
Polymers
Science & Technology
topic Piezoelectrics
PVDF
Ferroelectrics
Polymers
Science & Technology
description The phase diagram of the poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) copolymer system shows for VDF contents of 50...85 mol% a ferroelectric (FE)-paraelectric (PE) phase transition below melting temperature. Investigations on P(VDF-TrFE) 75/25 samples revealed a slight anisotropic behaviour, which leads to a strongly anisotropic stretching effect both on the phase transition and on the amount and nature of the FE phase in samples subjected to mechanical stretching along the main directions of the film. In this work, both the refractive index n1,2 and the piezoelectric coefficient d33 of mechanically stretched P(VDF-TrFE) have been measured for samples with different levels of permanent deformation. These parameters are found to reflect the anisotropy of the permanently deformed samples. The stretching effect is most pronounced (n1,2) or limited (d33) to the vicinity of the yielding point of the material. Above the yielding point, almost the piezoelectric d33 coefficient of the non-deformed sample is observed for samples with large permanent deformation.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-01-01T00:00:00Z
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 https://hdl.handle.net/1822/5173
url https://hdl.handle.net/1822/5173
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Serrado-Nunes, J., Kouvatov, A. Z., Müller, V., Beige, H., Brandão, P. M., Belsley, M., … Lanceros-Méndez, S. (2006, May 15). Piezoelectric and Optical Response of Uniaxially Stretched (VDF/TrFE) (75/25) Copolymer Films. Materials Science Forum. Trans Tech Publications, Ltd. http://doi.org/10.4028/www.scientific.net/msf.514-516.945
9780878494026
0255-5476
10.4028/www.scientific.net/msf.514-516.945
https://www.scientific.net/MSF.514-516.945
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.publisher.none.fl_str_mv Trans Tech Publications
publisher.none.fl_str_mv Trans Tech Publications
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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