Volume 300, Issue 1 pp. 99-106
Full Paper

Characterization of Viscoelasticity and Self-Healing Ability of VHB 4910

Fan Fan

Corresponding Author

Fan Fan

Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9 Canada

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Jerzy Szpunar

Jerzy Szpunar

Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9 Canada

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First published: 18 August 2014
Citations: 28

Abstract

The mechanisms responsible for the viscoelasticity and self-healing ability of VHB 4910 are studied. The type of chemical bonds is confirmed using Fourier transform infrared and Raman spectroscopy. The tensile tests demonstrate that the material has viscoelastic behavior that depends on the deformation speed and changes in the hysteresis area with different tensile strains. The shear modulus of entangled networks increases with the deformation speed. This behavior confirms that the viscoelasticity is due to the dissociation and re-association of non-covalent bonding. The hydrogen bonding initiates the healing process and the diffusion of molecular chains strengthens the self-healing ability.mame201400122-gra-0001

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