Thermal behavior and thermal safety of nitrate glycerol ether cellulose

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(E _a), reaction mechanism function, quadratic equation of specific heat capacity(C _p) with temperature were obtained. The kinetic parameters of the decomposition reaction are E _a=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 C _p=1.285-6.276×10 ^-3T+1.581×10 ^-5T ²(283 K<T<353 K). With these parameters, the thermal safety properties of NGEC were studied, such as the self-accelerating decomposition temperature(T _SADT), critical temperature of thermal explosion(T _b) and adiabatic time-to-explosion(t _Tlad). The results of the thermal safety evaluation of NGEC are: T _SADT=459.6 K, T _b=492.8 K, t _Tlad=0.8 s.