Investigation of relation between durability of adhesive joints of soft polymeric materials and roughness characteristics of glued surfaces

Abstract

Dependence of durability of adhesive joints of monolithic black rubber glued applying polyurethane glue with a textile material on temperature, load and surface roughness was investigated in this paper. Master curves were constructed using the temperature-time analogy. De-pendence of the coefficients of the WLF equation on grain size of the abrasive material that was used to roughen the surface was determined. A complex master curve was plot-ted using two analogies in parallel that can be used to fore-cast the durability of adhesive joints depending on three factors – temperature, load, and abrasive grain size. Ana-lytical expression of this dependence was derived after approximation of the complex master curve with the three-variable function. Fractal dimensions of rubber surface profiles were found, and their relation with the abrasive grain size was determined. A dependence of adhesive joints durability on temperature, load, and fractal dimen-sion was found.