Particle interactions mechanical interlocking

The evidence accumulated so far indicates that there is a full spectram of structures, from a liquid-like where the yield stress, = 0, to a solid-like with large o. For anisometric particles at (() > 1/p, yield may originate in mechanical interlocking of particles, but for spheres it stems from the interparticle interactions. When these interactions are weak o —> 0 is observed, with the arrow indicating the time effect. If the experiment is conducted at low rates of shear, no yield behavior would be noted. 

There are some interdependent adhesion mechanisms which govern the particle/ matrix interfacial strength in particulate composites such as mechanical interlocking, molecular entanglement, secondary force interactions, electrostatic attraction, chemical bonding, and polymer diffusion. 

The question arises as to whether the adhesion mechanism between RF resin and rubber is one of mere physical entanglement or whether specific chemical interaction is involved as well. Dlugosz has shown, by electron microscope examination of adhesive films, that the two phases of the adhesive remain discrete, and that the resin takes the form of a net which encloses the latex particle. He concluded that the adhesive functions principally by providing two mechanically interlocked phases. 

---