Increasing of photostability of HNS explosive in the presence of UV photostabilizers

The photostabilies of hexanitrostillbene (HNS) were studied at 1% wt. of photostabilizers. The photostabilizers of Chiguard BP-12 (UV- 531), ADK STAB LA-326 (UV- 326), ADK STAB LA-32 (UV-P), Irganox 1010 and Everstab LS944 were used in this study. A photoreactor including a 30 W monochromatic UV lam...

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Bibliographic Details
Published in:Defence technology 2021-04, Vol.17 (2), p.338-342
Main Authors: Pouretedal, Hamid Reza, Damiri, Sajjad, Karami, Zynab
Format: Article
Language:English
Subjects:
HNS explosive
Kinetic rate constant
Photodegradation
Photostabilizer
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Summary:The photostabilies of hexanitrostillbene (HNS) were studied at 1% wt. of photostabilizers. The photostabilizers of Chiguard BP-12 (UV- 531), ADK STAB LA-326 (UV- 326), ADK STAB LA-32 (UV-P), Irganox 1010 and Everstab LS944 were used in this study. A photoreactor including a 30 W monochromatic UV lamp was used for investigation of photodegradations of solid HNS. The changes in surface area of HNS peak in HPLC chromatogram at time intervals of 2, 4, 6 and 8 h were used for calculation of kinetic rate constants of photodegradation process. The compound of UV-P photostabilizer was found to have the greatest effect on enhancing photostability for HNS among the investigated photostabilizers. The kinetic rate constants were obtained 6.2 × 10−2 and 4.1 × 10−2 h−1, respectively, for photodegradation process of HNS in absence and in presence of UV-P.
ISSN:2214-9147
2214-9147
DOI:10.1016/j.dt.2020.02.001