http://iet.metastore.ingenta.com
1887

Characterisation and optimisation of the d 33 coefficient of cellular PP films

Characterisation and optimisation of the d 33 coefficient of cellular PP films

For access to this article, please select a purchase option:

Buy article PDF
$19.95
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IET Science, Measurement & Technology — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

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 d 33 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 d 33 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 d 33. Time stability was determined after 3000 h ageing, and finally was obtained a resonance frequency by interferometry measurement.

References

    1. 1)
      • 1. Kirjavainen, K.: ‘Electromechanical film and procedure manufacturing same’. US Patent No. 4.654.546, 1989. Available at http://www.google.es/patents/US4654546.
    2. 2)
      • 2. Raukola, J.I.: ‘A new technology to manufacture polypropylene foam sheet and biaxially oriented foam film’ (VTT Publications 361, Technical Research Center of Finland, 1998). Available at http://www.vtt.fi/inf/pdf/publications/1998/P361.pdf.
    3. 3)
      • 3. Giacometti, J.A., Fedosov, S., Costa, M.M.: ‘Corona charging of polymers: recent advances on constant current charging’, Braz. J. Phys., 1999, 29, (2), pp. 269279. Available at http://www.dx.doi.org/10.1590/s0103-97331999000200009.
    4. 4)
      • 4. Wegener, M., Wirges, W., Gerhard-Multhaupt, R., et al: ‘Controlled inflation of voids in cellular polymer ferroelectrets: optimizing electromechanical transducer properties’, Appl. Phys. Lett., 2004, 84, (3), p. 392. Available at http://dx.doi.org/10.1063/1.1641171.
    5. 5)
      • 5. Hillenbrand, J., Sessler, G.M.: ‘High-sensitivity piezoelectric microphones based on stacked cellular polymer films (L)’, J. Acoust. Soc. Am., 2004, 116, (6), p. 3267. Available at http://www.dx.doi.org/10.1121/1.1810272.
    6. 6)
      • 6. Bauer, S., Gerhard-Multhaupt, R., Sessler, G.M.: ‘Ferroelectrets: soft electroactive foams for transducers’, Phys. Today, 2004, 57, (2), pp. 3743. Available at http://www.dx.doi.org/10.1063/1.1688068.
    7. 7)
      • 7. Zhang, X., Hillenbrand, J., Sessler, G.M.: ‘Piezoelectric d[sub 33] coefficient of cellular polypropylene subjected to expansion by pressure treatment’, Appl. Phys. Lett., 2004, 85, (7), p. 1226. Available at http://www.dx.doi.org/10.1063/1.1781388.
    8. 8)
      • 8. Sessler, G.M., Hillenbrand, J.: ‘Electromechanical response of cellular electret films’, Appl. Phys. Lett., 1999, 75, (21), p. 3405. Available at http://www.dx.doi.org/10.1063/1.125308.
    9. 9)
      • 9. Taylor, D.M., Fernandez, O.: ‘Thermal instability of electromechanical films of cellular polypropylene’, IEEE Trans. Dielectr. Electr. Insul., 2005, 12, (4), pp. 768778. Available at http://www.dx.doi.org/10.1109/tdei.2005.1511102.
    10. 10)
      • 10. Peltonen, J., Paajanen, M., Lekkala, J.: ‘Determination of the actuator sensitivity of electromechanical polypropylene films by atomic force microscopy’, J. Appl. Phys., 2000, 88, (8), p. 4789. Available at http://www.dx.doi.org/10.1063/1.1290448.
    11. 11)
      • 11. van Turnhout, J.: ‘Thermally stimulated discharge of polymer electrets’, Polym. J., 1971, 2, (2), pp. 173191. Available at http://www.dx.doi.org/10.1295/polymj.2.173.
    12. 12)
      • 12. Bucci, C., Fieschi, R., Guidi, G.: ‘Ionic thermocurrents in dielectrics’, Phys. Rev., 1966, 148, (2), pp. 816823. Available at http://www.dx.doi.org/10.1103/physrev.148.816.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-smt.2016.0292
Loading

Related content

content/journals/10.1049/iet-smt.2016.0292
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address