An Evaluation of Potential Taggant-Polymer Combinations for Detection Tagging of Blasting Caps

摘要

The goal of this program is the selection of taggant-polymer combinations that can be incorporated in blasting caps allowing their vapor detection for 5 to 10 years. The background and criteria for the selection of taggants and polymeric matrices are presented. Due to the numerous taggant-polymer pairs to be screened, the parameters for the sorption process of the vapor taggant were limited to the immersion of the polymer substrate in liquid taggant at 95C and a few also at 25C for 24 hours. The emission rates under ambient conditions were measured by gravimetric method and compared with electron capture detection, and the accelerated emission rates at elevated temperatures were determined gravimetrically. The long-range emissions were extrapolated from gravimetric data at three temperatures. The effect of temperature and taggant-polymer combination on the emission processes are summarized.