Relationship between thermo-stimulated discharge currents and piezoelectric d33 constants in PP and PE foams

G. Ortega Brana, P. Llovera-Segovia, A. Rodrigo Mor, M. Dominguez-Lagunilla

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Cellular polymers films have a too soft mechanical characteristic, like elastic compliance due of the internal porosity structure and their high electric insulation that gives the ability of hosting internal electrical dipoles. If a corona discharge is applied to the surface, the high electrical field induces internal discharges which leave a permanent static charge in the polymer cells. A macro dipole of cell dimension is generated producing a quasi-piezoelectric response. The d33 piezoelectric constant can reach values of about many hundreds of pC/N. Thermally stimulated discharge currents (TSDC) are widely used to characterize charge density and stability of dielectric materials. In our work the relationship between TSDC and d33 piezoelectric constant of two cellular polymers based on polyethylene and polypropylene films is investigated. Samples were thermally stretched, charged by corona discharge and metallized on both sides. The d33 piezoelectric constant by quasi-static method was measured and then TSDC were registered. A strong relation between d33 constants and TSDC curves on both cellular polymers was obtained.

Original languageEnglish
Title of host publicationProceedings of the 2016 IEEE International Conference on Dielectrics (ICD)
EditorsJ. Castellon
PublisherIEEE
Pages249-252
Number of pages4
Volume1
ISBN (Electronic)978-1-5090-2804-7
ISBN (Print)978-1-5090-2804-4
DOIs
Publication statusPublished - 18 Aug 2016
Event1st IEEE International Conference on Dielectrics, ICD 2016 - Montpellier, France
Duration: 3 Jul 20167 Jul 2016

Conference

Conference1st IEEE International Conference on Dielectrics, ICD 2016
CountryFrance
CityMontpellier
Period3/07/167/07/16

Keywords

  • Cellular Polymer
  • Foams
  • Piezoelectric
  • Polyethylene
  • Polypropylene
  • Thermally Stimulated Discharge Currents

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