The evolution of the dielectric constant in various polymers subjected to uniaxial stretch

Noy Cohen, Shai Shalom Oren, Gal Debotton

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Dielectric elastomers (DEs) are materials that deform in response to electric excitation, an attractive feature that deems them suitable for various actuation-based devices. The growing interest in these materials leads to many intriguing questions regarding the origin of the electro-mechanical coupling and its relation to the dielectric constant. This work examines the coupled response of four dielectrics: VHB 4910, Polytetrauoroethylene (PTFE), High-density polyethylene (HDPE) and Low-density polyethylene (LDPE). We demonstrate the substantial dependence of their dielectric constants on the deformations. These findings are compared to a recent statistical-mechanics based model which takes into account the structure of the dielectric. A good agreement is found between the theoretical model and the experimental measurements.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalExtreme Mechanics Letters
Volume16
DOIs
StatePublished - 1 Oct 2017

Keywords

  • Dielectrics
  • EAPs
  • Electro-mechanics
  • Electrostriction

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