Piezoelectric and optical response of uniaxially stretched (VDF/TrFE) (75/25) copolymer films
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , , , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1817544297194455040 |