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Non-linear rheology of soft adhesives

Tetsuo Yamaguchi Department of Applied Physics, The University of Tokyo

Soft adhesives, which are made of weakly cross-linked polymer networks, are widely used not only in daily life but also in automobile, in semi-conductor production, and in medical applications. When soft adhesives are detached from a substrate, they are known to undergo large deformations and complex fracture behavior accompanying highly non-linear mechanical response. The relationship between internal deformation and mechanical properties is one of the most important topics in adhesive science. However, it is not well understood for this moment. In this presentation, I will first make a brief overview of my research, and then explain our experimental/theoretical studies on the fracture of soft adhesives (in-situ observation of stereoscopic structure during debonding [1] and continuum mechanics based modeling [2][3]). I will finally propose my plans of future studies.

References

[1] T. Yamaguchi, K. Koike and M. Doi, In-situ observation of
stereoscopic shapes of cavities in soft adhesives,
Europhys. Lett. 77, pp.64002-p1-p5 (2007)
[2] T. Yamaguchi, H. Morita and M. Doi, Modeling on debonding
dynamics of pressure-sensitive adhesives, Eur. Phys. J. E
20, pp. 7-17 (2006)
[3] T. Yamaguchi, C. Creton, and M. Doi, A simple model
on debonding of soft adhesives, submitted.