Photon emission during deformation of glass‐fiber‐reinforced bisphenol‐a‐polycarbonate

摘要

AbstractWe give a survey on mechanically induced emission phenomena (acoustic emission AE, neutral particle emission NE, electron and charged particle emission EE/PIE, radio wave emission RE of polymers and briefly summarize these effects in unfilled and glass‐fiber‐reinforced bisphenol‐A‐polycarbonate. A general treatment of the photon emission kinetics in terms of analysis and description, using a convolution function, is proposed. The kinetics obey a power law decay in time. By examining a model mechanism for the interfacial failure of the composite, i.e., by peeling of glass/polymer laminates, we show that the origin of the photon emission is the polycarbonate matrix after cleavage of the glass/polymer interface. Spectral characteristics of mechanically induced luminescence of glass‐filled polycarbonate and of the peeling spectra of the model system of glass/polycarbonate laminates are discussed. Different brands of polycarbonate yield identical spectra. Spectra recorded during peeling in vacuum are very similar to those recorded during deformation of the composite. Polarized fluorescence spectroscopy and electronbeam luminescence were used to obtain further information about the intrinsic polycarbonate–chromophores that are available for mechanically induced photon emission. © 1993 John Wil