Peeling of polydimethylsiloxane adhesives: The case of adhesive failure |
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| Authors: | Claude Verdier Guillaume Ravilly |
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| Affiliation: | 1. Laboratoire de Spectrométrie Physique, CNRS and Université de Grenoble UJF (UMR5588), BP 87, 140 Avenue de la Physique, 38402 Saint‐Martin d'Hères cedex, FranceLaboratoire de Spectrométrie Physique, CNRS and Université de Grenoble UJF (UMR5588), BP 87, 140 Avenue de la Physique, 38402 Saint‐Martin d'Hères cedex, France;2. Laboratoire de Rhéologie (UMR 5520, UJF‐CNRS), BP 53 Domaine Universitaire, 1301 rue de la Piscine, 38041 Grenoble Cedex 9, France |
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| Abstract: | The adhesion properties of high molecular weight polydimethylsiloxane adhesives are measured using 90°‐peel adhesion tests, in the high velocity range. Such adhesives undergo mainly adhesive failure in this regime. The influence of viscosity (non‐Newtonian), adhesive thickness, peeling velocity, and backing properties are studied, and new unexpected behaviors are shown. The role of rheology and peeling velocity can be explained by an extension of a model already presented for cohesive failure, by using a power‐law fluid for the adhesive. On the other hand, the influence of the backing rigidity reveals to be coupled with the adhesive elastic properties, this effect being correlated to the introduction of a new parameter in the model, the Weissenberg number for viscoelasticity. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2113–2122, 2007 |
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| Keywords: | adhesion interfaces thin films |
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