Peeling of polydimethylsiloxane adhesives at low velocities: cohesive failure

Jean-Michel Piau (1) , Guillaume Ravilly (1) , Claude Verdier (2)

1 LR - Laboratoire de rhéologie
2 LSP - Laboratoire de Spectrométrie Physique

This work presents results obtained in 90-degree peeling tests at low velocities in the case of Newtonian adhesives, when failure is cohesive. Peeling experiments are described and consider the influence of the thickness, viscosity and surface tension of the adhesive, as well as the backing rigidity. A simple model, based on lubrication effects in thin films, is considered and compared with the measurements, when peeling is a two-dimensional phenomenon. Furthermore, a criterion for predicting the transition between the two dimensional regime and the three dimensional one at higher velocities is proposed.

Mots clés: adhesion; rheology; failure; cohesive; PDMS

Domaines: Matériaux

Jean-Michel Piau, Guillaume Ravilly, Claude Verdier. Peeling of polydimethylsiloxane adhesives at low velocities: cohesive failure. Journal of Polymer Science Part B: Polymer Physics, 2005, 43 (2), pp.145-157. ⟨10.1002/polb.20318⟩. ⟨hal-00197588⟩