Contact adhesion of rubber: Influence of humidity, substrate history and viscoelasticity
1987
Carre, A. | Roberts, A. D.
An estimate of the surface energy of polymeric solids can be obtained by wetting measurements. An alternative, in the case of rubber, is to deduce the apparent surface energy by direct optical observations of solid-solid contact areas. This study reports contact observations for the adhesion of rubber hemispheres against glass and plastics substrates. The measurements suggest that the level of adhesion is sensitive to ambient humidity, substrate surface history and viscoelastic response of the rubber. Particular emphasis is placed upon the difference between the making and the breaking of contact. Analysis of the measurements indicates the important roles of surface energy and rubber hysteresis, an increase in either or both leading to higher apparent peel energies but lower adhering energies.
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