物理化学学报 >> 2008, Vol. 24 >> Issue (08): 1371-1377.doi: 10.3866/PKU.WHXB20080808

研究论文 上一篇    下一篇

含CL-20的改性双基推进剂的热行为及非等温反应动力学

徐司雨; 赵凤起; 仪建华; 胡荣祖; 高红旭; 李上文; 郝海霞; 裴庆   

  1. 西安近代化学研究所, 西安 710065
  • 收稿日期:2008-02-18 修回日期:2008-04-27 发布日期:2008-08-06
  • 通讯作者: 赵凤起 E-mail:npecc@21cn.com

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

XU Si-Yu; ZHAO Feng-Qi; YI Jian-Hua; HU Rong-Zu; GAO Hong-Xu; LI Shang-Wen; HAO Hai-Xia; PEI Qing   

  1. Xi’an Modern Chemistry Research Institute, Xi’an 710065, P. R. China
  • Received:2008-02-18 Revised:2008-04-27 Published:2008-08-06
  • Contact: ZHAO Feng-Qi E-mail:npecc@21cn.com

摘要: 用DSC和TG方法研究了含六硝基六氮杂异伍兹烷(CL-20)的改性双基推进剂在常压(0.1 MPa)和高压(4和7 MPa)下的热行为和高压下的热分解反应动力学. 结果表明, 该推进剂常压下DSC曲线有3个放热峰, 相应TG曲线有3个失重过程; 而高压下DSC曲线只有一个放热峰, 高压下放热峰的峰温随加热速率增大而升高. 高压下该推进剂放热分解反应机理和反应动力学参数受测试环境压强影响较弱, 反应机理是随机成核和随后生长, 放热分解反应的动力学方程可以表示为, 4 MPa时, dα/dt=1014.5(1-α)[-ln(1-α)]1/3e-17981.7/T; 7 MPa时, dα/dt=1014.7(1-α)·[-ln(1-α)]1/3e-18138.1/T.

关键词: 推进剂, 热重分析, 差示扫描量热分析, 非等温反应动力学, CL-20

Abstract: 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).

Key words: Propellant, Thermogravimetric analysis, Differential scanning calarimetry, Non-isothermal reaction kinetics, CL-20

MSC2000: 

  • O643