Aging investigation of a cast-cure explosive in terms of chemical and physical properties

Date

2025-7

Author

Yücel, Tarık

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In this study, the physical and chemical effects of aging on castable plastic bonded explosive (PBXN-109), in which the antioxidant content was changed by subjecting it to accelerated aging, were examined and for this purpose, Shore A hardness, crosslink density, antioxidant content, tension test, fourier transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA) and scanning electron microscope (SEM) analyzes were performed. The accelerated aging temperature was chosen between 30°C and 80°C. Aging times have been determined to correspond to approximately 10 years thermal equivalent load for aging temperatures of 60°C and above. As a result of the study, it was understood that crosslinking and chain scission are two competing processes and chain scission is more dominant at high temperatures. It has been observed that stress-strain properties reflect the physical effects of aging more clearly than chemical effects. On the other hand, it has been shown that high AO content has a slowing effect on the chemical effects of aging. In addition, it has been understood that the bonding agent has an important function in this type of polymer compositions and its deficiency has an accelerating effect on aging. Finally, the shelf life of the explosive was calculated to be approximately 10 years using the Arrhenius and Berthelot approaches.

Subject Keywords

PBXN-109, aging, cast-cure explosives, crosslinking, antioxidants

URI

https://hdl.handle.net/11511/115437

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Graduate School of Natural and Applied Sciences, Thesis