DIELECTRIC-SPECTROSCOPY OF ANAEROBIC ADHESIVE CURE

Dielectric spectroscopy (DS) is shown to be a most useful tool for the study of the surface initiated redox cure in model anaerobic acrylic adhesives. These models are deliberately designed to exhibit different levels of cure heterogeneity. The cure is initiated by the surfaces o f two substrates on either side of a bondline. The heterogeneous cure situation is referred to as low cure through volume (CTV). Poor CTV is an undesirable feature that leads to mechanical weakness in an adhesi ve bond. Thus, experimental techniques based on DS are developed to in vestigate the cure characteristics and in particular the CTV phenomeno n in the model anaerobic adhesives.