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|Title:||Thermal decomposition mechanism of particulate core-shell KClO3-HMX composite energetic material|
|Abstract:||The thermal decomposition mechanism of a newly designed composite material KClO<sub>3</sub>-HMX (KC-HMX) is investigated by combined TG-DSC-FTIR technique and T/Jump in-situ thermolysis cell/FTIR (T/Jump FTIR) technique<span style="font-family:" ms="" mincho";mso-bidi-font-family:"ms="" mincho";letter-spacing:="" -.1pt"="" lang="EN-US">．It is shown that KC-HMX began to decompose at about 266°C without melting, and the fast stage of mass loss at the temperature range of 268.4~290.1°C is considered to be the result of the thermolysis and complex reactions of KClO<sub>3</sub> and HMX with energy release of 1859 J.g<sup>-1</sup>, which exceeded that of pure HMX about 40%. It is also shown that CO, CO<sub>2</sub>, NO<sub>2</sub> and H<sub>2</sub>O were the main gaseous products. The T/Jump FTIR analysis showed that the competing reactions of N-N and C-N bonds cleavage occurred in initial stage of HMX decomposition are greatly affected by KClO<sub>3</sub>. In contrast of pure HMX, there is no CH<sub>2</sub>O and HCN detected in its thermolysis products. In presence of electronegative oxygen radical produced by thermolysis of KClO<sub>3</sub> oxidized CH<sub>2</sub>O and HCN through gas-phase reaction “(NO<sub>2</sub>+4O<sub>2</sub>) + (2N<sub>2</sub>O+5CH<sub>2</sub>O) → 5NO+3CO+2CO<sub>2</sub>+5H<sub>2</sub>O”, which is probably the dominating reaction, being immediately followed by the decomposition reaction of HMX. </span>|
|ISSN:||0975-1017 (Online); 0971-4588 (Print)|
|Appears in Collections:||IJEMS Vol.18(5) [October 2011]|
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