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Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (3): 516-519.

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Thermal Behavior and Thermal Safety of Nitrate Glycerol Ether Cellulose

XU Si-yu1, ZHAO Feng-qi1, YI Jian-hua1, GAO Hong-xu1, SHAO Zi-qiang2, HAO Hai-xia1, HU Rong-zu1, PEI Qing1   

  1. 1. Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, P. R. China;
    2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2011-07-13 Revised:2011-08-30 Online:2012-05-25 Published:2012-05-03
  • Contact: ZHAO Feng-qi E-mail:npecc@163.com
  • Supported by:

    Supported by the Foundation of National Key Laboratory of Science and Technology on Combustion and Explosion of China (No.9140C3503011004).

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Abstract: The thermal behavior, nonisothermal decomposition reaction kinetics and specific heat capacity of nitrate glycerol ether cellulose(NGEC) were determined by thermogravimetric analysis(TGA), differential scanning calorimetry(DSC) and microcalorimetry. The apparent activity energy(Ea), reaction mechanism function, quadratic equation of specific heat capacity(Cp) with temperature were obtained. The kinetic parameters of the decomposition reaction are Ea=170.2 kJ/mol and lg(A/s–1)=16.3. The kinetic equation is f(α)＝(4/3)(1–α)[–ln(1–α)]1/4. The specific heat capacity equation is Cp=1.285–6.276×10–3T+1.581×10–5T2(283 K<T<353 K). With these parameters, the thermal safety properties of NGEC were studied, such as the self-accelerating decomposition temperature(TSADT), critical temperature of thermal explosion(Tb) and adiabatic time-to-explosion(tTlad). The results of the thermal safety evaluation of NGEC are: TSADT=459.6 K, Tb=492.8 K, tTlad=0.8 s.

Key words: Nitrate glycerol ether cellulose, Thermal decomposition reaction kinetics, Thermal safety property