Sponge Model for the Kinetics of Surface Thermal Decomposition of Microcrystalline Solids: Application to HMX

Journal of Physical Chemistry B

Volumn 103, Issue 41, 1999, Pages 8650-8656

  Simons, Jack ^a  

^a UNIVERSITY OF UTAH   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0344287561     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp9842143     Document Type: Article

References (10)

1. The micrographs shown in Figure 1 were obtained from Prof. C. A. Wight at Utah and appear in: Lofy, P.; Wight, C. A. Thermal Decomposition of HMX Below Its Melting Point. Proceedings of the JANNAF Combustion Subcommittee Meeting; Tucson, AZ, 1998; Chemical Propulsion Information Agency, Johns Hopkins University: Baltimore, 1998.
2. Eyring, H.; Powell, R. E.; Duffey, C. H.; Parlin, R. B. Chem. Rev. 1959, 45, 16.
3. (a) Behrens, R., Jr.; Bulusu, S. Mater. Res. Soc. Symp. Proc. 1993, 296, 13.
4. (b) Behrens, R. J. Phys. Chem. 1990, 94, 6706.
5. (c) Behrens, R.; Mack, S.; Wood, J. Presented at the JANNAF Combustion and Hazards Meeting, Tucson, AZ, Dec 1998.
6. Tarver, C.; Chidester, S.; Nichols, A. J. Phys. Chem. 1996, 100, 5794.
7. Brill, T.; Gongwer, P.; Williams, G. J. Phys. Chem. 1994, 98, 12242.
8. A wide range of phenomenological rate laws are discussed in Global Kinetic Analysis of Complex Materials (Burnham, A. K.; Braun, R. L. Energy Fuels, submitted for publication) although no molecular-level mechanism is used to achieve the rate law form used here.
9. 2 bonds should be close to the N-N bond energy for an isolated HMX molecule.
10. It is possible to circumvent the averaging approximation by using computer simulations to solve equations for the instantaneous survival probabilities of individual HMX molecules at each lattice site. However, our intent here is to offer an analytical model that may prove useful, even if more approximate, in understanding and analyzing the observed thermal decomposition rates of microcrystalline solids.