Mechanical properties of slide-ring materials for dielectric elastomer actuators

K. Mayumi; C. Liu; Takanori Nakai; Makoto Ishida; Hiromitsu Takeuchi; Katsunari Inoue; Kenji Urayama; Hideaki Yokoyama; Kohzo Ito

doi:10.1117/12.2513886

13 March 2019 Mechanical properties of slide-ring materials for dielectric elastomer actuators

K. Mayumi, C. Liu, Takanori Nakai, Makoto Ishida, Hiromitsu Takeuchi, Katsunari Inoue, Kenji Urayama, Hideaki Yokoyama, Kohzo Ito

Author Affiliations +

Proceedings Volume 10966, Electroactive Polymer Actuators and Devices (EAPAD) XXI; 1096619 (2019) https://doi.org/10.1117/12.2513886
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Slide-ring materials (SRM) are novel polymeric elastomers which are prepared from necklace-like supramolecule, polyrotaxane, consisting of ring molecules and axial polymer. By cross-linking rings of polyrotaxanes, axial polymer chains are connected via ring molecules which can slide on polymer chains. The slidability of the cross-linking points leads to softness and deformability of SRMs. In this work, we investigate the unique mechanical properties of SRMs to apply them to dielectric elastomer actuators (DEAs). From dynamic viscoelasticity measurements, we have found that SRMs exhibit entropic elasticity and low elastic modulus. The stress strain relation of SRMs under uniaxial deformation follows ideal rubber elasticity model in a wide strain range, suggesting homogeneous and reversible network deformation caused by the sliding of cross-linking points in SRMs. The ideal rubber elasticity of SRMs results in their softness and low hysteresis under large deformation, which are advantages for the application as dielectric elastomer actuators.

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K. Mayumi, C. Liu, Takanori Nakai, Makoto Ishida, Hiromitsu Takeuchi, Katsunari Inoue, Kenji Urayama, Hideaki Yokoyama, and Kohzo Ito "Mechanical properties of slide-ring materials for dielectric elastomer actuators", Proc. SPIE 10966, Electroactive Polymer Actuators and Devices (EAPAD) XXI, 1096619 (13 March 2019); https://doi.org/10.1117/12.2513886

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