Understanding the role of crosslink density and linear viscoelasticity on the shear failure of pressure-sensitive-adhesives
Anthony J. Arrowood, Mohammad A. Ansari, Matteo Ciccotti, Rui Huang, Kenneth M. Liechti, Gabriel E. Sanoja
Abstract
-acrylic acid) physically crosslinked with aluminum acetylacetonate. The key result is that crosslinking PSAs leads to notable stress concentrations ahead of the peel front, as well as a transition from cohesive to adhesive failure. The shear stress distributions, as evaluated by means of a linearly viscoelastic shear lag model, suggest that this transition is related to the evolution of the ratio of the load transfer length to the bond length as dictated by the mechanical properties of the backing and adhesive layers, and the geometry of the tape.
Topics & Concepts
ViscoelasticityMaterials scienceAdhesiveShear (geology)Composite materialPressure sensitivePolymerShear stressResistLayer (electronics)Adhesion, Friction, and Surface InteractionsMechanical Behavior of CompositesPolymer composites and self-healing