Adhesion strength and fracture behavior between carbon black-filled rubbersheets

Adhesion behavior at the interface between a partially-crosslinked and a fu lly-crosslinked sheet of carbon black-filled rubber compound was investigat ed over a temperature range from 30 to 120 degreesC, The values of adhesion fracture energy G, were compared with those of cohesive tear energy G,. A considerable chemical, as well as physical, interfacial bonding is formed w hen the uncrosslinked or partially-crosslinked sheet is crosslinked in cont act with even a fully-crosslinked sheet, However, there is only a small pos sibility of chemical bonding when the two fully-crosslinked rubber layers a re again crosslinked in contact with each other. An interesting failure mod e, termed 'interfacial knotty tearing' was found for a strain-induced cryst allizable natural rubber.