Лако-красочные материалы — производство

Having discussed the nature of surfaces and of surface roughness we now move on to examine some recently published work, selected to illustrate different ways in which inter­facial roughness may affect the strength of an adhesive joint. Interfacial roughness of potential significance in adhesion may be on a scale ranging from the macroscopic to the molecular. At all of these scales there are connections between roughness and adhesion appropriate for consideration in terms of the mechanical theory. Of course, for surfaces that are fractal in nature, the question of the ‘‘scale’’ of the roughness becomes arbitrary. In the following sections, the discussion moves from examples of roughness on a macro­scale, through microroughness to roughness on the nanoscale.