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Forces Involved in Adhesion


The establishment of interfacial bonds through forces at the interface causes materials to attract one another. Therefore, adhesion between materials and adhesive in assemblies are intimately related to the interatomic and intermolecular interactions at the interface of the two considered surfaces. Describing the mechanism responsible for adhesion in simple terms is difficult due to the complexity and evolving understanding of the subject. Nevertheless, when considering adhesion phenomena, it is important to consider both the bulk and surface mechanical properties of the materials in contact and the type of interfacial forces established at the interface. High adhesion can only be obtained if the interface can sustain sufficient stress to induce dissipative forms of deformation, such as flow, yield or crazing, in the polymer. Under most circumstances such dissipative processes can only be obtained when the interface is coupled with a sufficient density