Defence Technology (Apr 2021)

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

  • Hamid Reza Pouretedal,
  • Sajjad Damiri,
  • Zynab Karami

Journal volume & issue
Vol. 17, no. 2
pp. 338 – 342

Abstract

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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.

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