Abstract
For a wide range of materials the emission of electrons (EE), positive ions (PIE), neutral species (NE), and photons (phE) has been observed accompanying fracture. We refer collectively to these emissions as fractoemission. In this paper we review our work on fracto-emission where the fracture event involves interfacial or adhesive failure. The interfaces to be discussed include the following: brittle materials/epoxy, glass/elastomers, and brittle materials/pressure sensitive adhesives. Results are presented for both large (1 cm2) planar surfaces as well as a few micron fibers (e.g., E-glass, S-glass, Kevlar™, and Graphite) and small (10–500 /μm) particles in polymer matrices. When adhesive failure occurs it appears to lead to highly reactive surface species, perhaps free radicals, and charge separation. Subsequent chemical reactions in the presence of surface charge produces intense, long lasting (several minutes) emission of charged particles and excited neutral species. The energies of the charged particle emission can be several hundred electron volts. In this paper we describe measurements of the time dependence, energy distributions, crack velocity dependence, and spatial distributions of the FE. We also discuss correlations between the various FE components and present results on determining the mass of the PIE.
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© 1984 Plenum Press, New York
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Dickinson, J.T. (1984). Fracto-Emission Accompanying Adhesive Failure. In: Lee, LH. (eds) Adhesive Chemistry. Polymer Science and Technology, vol 29. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2435-5_10
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DOI: https://doi.org/10.1007/978-1-4613-2435-5_10
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