Elastic and electromechanical properties of polypropylene foam ferroelectrets

M. Dansachmüller, R. Schwödiauer, S. Bauer-Gogonea, S. Bauer (Corresponding Author), Mika Paajanen, Jaakko Raukola

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)


Internally charged closed-cell polymer electrets exhibit ferroelectric-like behavior and have been called ferroelectrets. They are attractive for soft electroactive transducers, the high compressibility leads to d33 transducer coefficients exceeding those of ferroelectric polymers. A technique for the measurement of the elastic modulus and the transducer coefficient of ferroelectrets is reported. The elastic behavior of ferroelectretic polypropylene foams is correlated with the piezoelectric-like properties. Prestress treatments linearize the transducer properties.
Original languageEnglish
Article number031910
Number of pages3
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed


  • polymer foams
  • ferroelectric materials
  • electrets
  • elastic moduli
  • stress-strain relations
  • electromechanical effects
  • compressibility

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