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Transition from viscoelastic to fracture-like peeling of pressure-sensitive adhesives

Abstract : We investigate the process of the slow unrolling of a roll of typical pressure-sensitive adhesive, Scotch tape, under its own weight. Probing the peeling velocities down to nm/s resolution, which is three orders of magnitudes lower than earlier measurements, we find that the speed is still non-zero. Moreover, the velocity is correlated to the relative humidity. A humidity increase leads to water uptake, making the adhesive weaker and easier to peel. At very low humidity, the adhesive becomes so stiff that it mainly responds elastically, leading to a peeling process akin to interfacial fracture. We provide a quantitative understanding of the peeling velocity in the two regimes.
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Submitted on : Friday, November 18, 2022 - 11:41:20 AM
Last modification on : Saturday, November 19, 2022 - 3:51:31 AM

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Marion Grzelka, Stefan Kooij, Sander Woutersen, Mokhtar Adda-Bedia, Daniel Bonn. Transition from viscoelastic to fracture-like peeling of pressure-sensitive adhesives. Soft Matter, 2022, 18 (5), pp.999-1004. ⟨10.1039/D1SM01270C⟩. ⟨hal-03859501⟩



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