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Thermal decomposition mechanism of particulate core-shell KClO3-HMX composite energetic material
Authors: Lin-Guan Liao | Qilong Yan | Ya Zheng | Zhen-Wei Song | Jun-Qiang Li | Peng Liu
Year: 2012
Type of publication: článek v odborném periodiku
Name of source: Indian Journal of Engineering and Materials Sciences
Publisher name: National Institute of Science Communication and Information Resources (NISCAIR)
Place: New Delhi
Page from-to: 393-398
Titles:
Language Name Abstract Keywords
cze Mechanizmus tepelného rozkladu částicj ádrové střely na bázi kompozitu KCLO3-HMX Mechanizmus tepelného rozkladu nově navrženého kompozitního materiálu KClO3-HMX (KC-HMX) je zkoumán kombinovanou techniku TG-DSC-FTIR a T/skok in-situ thermolýzy buňky/FTIR (T/skok FTIR) techniku. Je prokázáno, že KC-HMX začal se rozkládat při cca 266 ° C bez tavení a fáze rychlého úbytku hmotnosti v rozmezí teplot 268.4 podobně do 290.1 ° C za uvolnění tepla1859 J.g-1, která přesahovala čistého HMX asi o 40%. V přítomnosti kyslíku elektronegativní radikály jsou produkované thermolýzou HMX-KClO3 dávjíce CH2O a HCN prostřednictvím plynu fáze reakce "(NO2+4O2 + (2N2O+5CH2O)-> 5NO + 3CO + 2CO 2 + 5 H 2 O", což je zřejmě dominantní reakce, okamžitě následuje reakce rozkladu HMX. TG-DSC-FTIR; HMX; chloristan draselný; mechanizmus rozkladu
eng Thermal decomposition mechanism of particulate core-shell KClO3-HMX composite energetic material The thermal decomposition mechanism of a newly designed composite material KClO3-HMX (KC-HMX) is investigated by combined TG-DSC-FTIR technique and T/Jump in-situ thermolysis cell/FTIR (T/Jump FTIR) technique. 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 similar to 290.1 °C is considered to be the result of the thermolysis and complex reactions of KClO3 and HMX with energy release of 1859 J.g-1, which exceeded that of pure HMX about 40%. In contrast of pure HMX, there is no CH2O and HCN detected in its thermolysis products. In presence of electronegative oxygen radical produced by thermolysis of KClO3 oxidized CH2O and HCN through gas-phase reaction "(NO2+4O(2)) + (2N(2)O+5CH(2)O) -> 5NO+3CO+2CO(2)+5H(2)O", which is probably the dominating reaction, being immediately followed by the decomposition reaction of HMX. TG-DSC-FTIR; HMX; Potassium chlorate; Decomposition mechanism

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