Fracto‐emission from filled and unfilled polybutadiene

We further examine the mechanisms involved in the emission of electrons and positive ions from polybutadiene accompanying fracture. Experimental evidence is given in support of a previously presented model involving a microdischarge accompanying fracture which excites the fracture surfaces by particle bombardment. Calculations of the time dependence for the emission from such excitations for both isothermal and thermal stimulation from a simple trap model are presented. We conclude that both filled and unfilled polybutadiene are experiencing the same excitations except at a considerably reduced intensity for the unfilled material.