Ortega Braña, GE.; Llovera Segovia, P.; Rodrigo Mor, A.; Quijano Lopez, A. (2017). Characterisation and optimisation of the d33 coefficient of cellular PP films. IET Science Measurement & Technology. 11(1):125-133. doi:10.1049/iet-smt.2016.0292
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/101785
Title:
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Characterisation and optimisation of the d33 coefficient of cellular PP films
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Author:
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Ortega Braña, Gustavo Eloy
Llovera Segovia, Pedro
Rodrigo Mor, Armando
Quijano Lopez, Alfredo
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UPV Unit:
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Universitat Politècnica de València. Instituto de Tecnología Eléctrica - Institut de Tecnologia Elèctrica
Universitat Politècnica de València. Departamento de Ingeniería Eléctrica - Departament d'Enginyeria Elèctrica
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Issued date:
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Abstract:
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[EN] Piezoelectric polymer cellular films have been studied since 1986. In recent years, they have improved the potential applications due to materials progress. Cellular polypropylene (PP) polymers are characterised by ...[+]
[EN] Piezoelectric polymer cellular films have been studied since 1986. In recent years, they have improved the potential applications due to materials progress. Cellular polypropylene (PP) polymers are characterised by its high piezoelectric coefficient d33 in comparison with other piezoelectric materials such as ceramics. One of the advantages of these films is their elasticity and flexibility. This study is based on the optimisation of the activation process and characterisation results of polymer cellular films. Samples were made of a commercially available PP film which was modified by a thermal biaxial stretching. Coefficient d33 was measured by a quasi-static method and the frequency characterisation was made for validating all characterisations and their relations. Transducer coefficients around 700 pC/N were obtained with polymer cellular PP films with silver coating electrodes, activated by corona discharge. An approximation of the surface charge density in the polymer voids was obtained with a mathematical model. Thermal stability was checked by thermally stimulated discharge currents (TSDCs) showing a relationship between the TSDC and the coefficient d33. Time stability was determined after 3000 h ageing, and finally was obtained a resonance frequency by interferometry measurement
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Subjects:
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Piezoelectrics
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D33 constant
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Polymer foams
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Laser interferometry
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Thermostimulated discharge currents
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Copyrigths:
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Reserva de todos los derechos
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Source:
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IET Science Measurement & Technology. (issn:
1751-8822
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DOI:
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10.1049/iet-smt.2016.0292
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Publisher:
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Institution of Electrical Engineers
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Publisher version:
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https://doi.org/10.1049/iet-smt.2016.0292
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Thanks:
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This work was supported by the Institute of Electrical Technology, the Polytechnic University of Valencia, and the Delft University of Technology.
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Type:
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Artículo
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