Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (10): 2613-2618.doi: 10.3866/PKU.WHXB20100950

• THERMODYNAMICS,THERMOCHEMISTRY AND SOLUTION CHEMISTRY • Previous Articles     Next Articles

Morphology Control and Its Influence on the DecompositionBehavior and Sensitivity of KDNBF

FENG Jin-Ling1, ZHANG Jian-Guo1ZHANG Tong-Lai1,  LI Zhi-Min1, YANG Li1, WANG Shao-Zong2   

  1. 1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China;
    2. Academy of Machinery Science&Technology, Beijing 100083, P. R. China
  • Received:2010-03-12 Revised:2010-06-22 Published:2010-09-27
  • Contact: ZHANG Jian-Guo, ZHANG Tong-Lai E-mail:zhangjianguobit@yahoo.com.cn, ztlbit@bit.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20471008) and Programfor NewCentury Excellent Talents in Universities of the Ministry of Education of China (NCET-09-0051).

Abstract:

The potassium salt of 7-hydroxy-4,6-dinitro-5,7-dihydrobenzofuroxanide (KDNBF) was prepared by a reaction of the sodium salt of DNBF with potassium sulfate in aqueous solution. Samples of KDNBF with different morphologies were obtained by adding various surfactants. The effect of a single surfactant on the sample morphology was determined withpowder X-ray diffraction (XRD) data. The thermal decomposition behaviors of KDNBF with different shapes were studied using differential scanning calorimetry(DSC) and thermogravimetry(TG) analyses. The kinetic parameters of the exothermic processes were studied by applying the Kissinger 's and Ozawa-Doyle 's methods. The results show that the spherical sample has a lower decomposition temperature and higher reaction activation energy than the other forms of the sample. Furthermore, impact sensitivity, flame sensitivity, and friction sensitivity tests indicated that the spherical KDNBF sample has stronger friction and impact sensitivities and weaker flame sensitivity.

Key words: Thermal behavior, Potassium salt of 7-hydroxy-4,6-dinitro-5,7-dihydrobenzo-furoxanide, Morphology, Sensitivity, Surfactant

MSC2000: 

  • O642