Volume 112, Number 2, October 2015
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 November 2015|
Effect of temperature on the electromechanical actuation of viscoelastic dielectric elastomers
1 State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University Xi'an, 710049, China
2 School of Mechanical Engineering, Xi'an Jiaotong University - Xi'an, 710049, China
3 Institute of Systems Engineering, China Academy of Engineering Physics - Mianyang, 621900, China
(a) email@example.com (corresponding author)
Received: 8 June 2015
Accepted: 20 October 2015
The electromechanical deformation of viscoelastic dielectric elastomers (DEs) is primarily governed by three material parameters: permittivity, Young's modulus, and relaxation time. All three parameters are functions of temperature, so a complete description of the electromechanical behaviour of a DE must take thermal effects into account. In this paper, we have established a physical model for viscoelastic DEs that takes temperature effects into consideration. The actuation of a DE was measured under different temperatures to verify the model. A peak actuation stretch was obtained at around 363 K both experimentally and theoretically. Moreover, we also demonstrate the contribution of strain-stiffening induced by greater pre-stretching to the improvement of thermostability.
PACS: 77.84.Jd – Polymers; organic compounds / 77.65.-j – Piezoelectricity and electromechanical effects / 61.41.+e – Polymers, elastomers, and plastics
© EPLA, 2015
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