Abstract
This work introduces laser induced breakdown spectroscopy (LIBS) as a novel, cheap and non-destructive method to study the changes of mechanical properties of plastic bonded explosives (PBX) during their aging. Accelerated aging was used in three different temperatures 60, 70, and 80 °C to obtain different aged samples. The measurements of mechanical properties analysis were also done on the aged samples to validate the resulted data from LIBS spectroscopy. LIBS tests were done in both air and argon atmosphere, in which molecular bands such as CN and C2 radiation were compared for all aged samples. In order to more accurate discrimination between spectra of different samples, principal component analysis (PCA) was used as a suitable chemometric method. All these results represent the changes in the chemical structure of specimens, which are due to increasing time and temperature during their aging processes.
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