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Free Content Thermal Behavior and Non-Isothermal Decomposition Reaction Kinetics of Composite Modified Double Base Propellant Containing CL-20

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Thermal behavior under pressures of 0.1, 4, and 7MPa and non-isothermal decomposition reaction kinetics under pressures of 4 and 7MPa of the composite modified double base propellant containing hexanitrohexaazaisowurtzitane (CL-20-CMDB propellant) were investigated by differential scanning calarimetry (DSC) and thermogravimetry (TG). The results showed that there were three exothermic peaks on DSC curve and three mass loss stages on TG curve under 0.1 MPa. There was only one exothermic peak on the DSC curve under 4 and 7 MPa. The exothermic peak temperatures under 4 and 7 MPa increased with increasing the heating rate. The exothermic decomposition reaction mechanism and kinetic parameters of the propellant changed little with testing surroundings. The reaction mechanism was randomnucleation and then growth. The kinetic equations of exothermical decomposition reaction can be expressed as, dα/dt=1014.5(1-α)[-ln(1-α)]1/3e-17981.7/T (under 4 MPa) and dα/dt=1014.7(1-α)[-ln(1-α)]1/3e-18138.1/T (under 7 MPa).
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Keywords: CL-20; Differential scanning calarimetry; Non-isothermal reaction kinetics; Propellant; Thermogravimetric analysis

Document Type: Research Article

Publication date: 15 August 2008

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  • Acta Physico-Chimica Sinica, founded in 1985, is sponsored by the Chinese Chemical Society and organized by the College of Chemistry and Molecular Engineering, PekingUniversity. Since 1997, Acta Physico-Chimica Sinica has been indexed in SCI of ISI (US). Acta Physico-Chimica Sinica is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and material physical chemists. Manuscripts that are essentially reporting data, applications of data, or reviews of the literature are not suitable for publication in Acta Physico-Chimica Sinica.
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