Kinetics and Mechanism of the Thermal Decomposition Reaction of 3,3-Bis（azidomethyl）oxetane／Tetrahydrofuran Copolymer

Introduction 3,3-Bis(azidomethyl)oxetane/tetrahydrofuran (BAM- O/THF, marked as B/T) copolymer can be used as an azide binder of high energy propellants with the lower signature, and lower sensitivity to improve the me-chanical properties at lower temperature and the burning rate characteristics. Its decomposition kinetics and the effects of THF on the decomposition kinetics of BAMO copolymers have been reported.1,2 In the present work, we report the kinetic model function and kinetic pa…

Kinetics and Mechanism of the Thermal Decomposition Reaction of 3,3-Bis(azidomethyl)oxetane/Tetrahydrofuran Copolymer

The thermal behavior, mechanism and kinetic parameters of the exothermic decomposition reaction of 3,3‐bis(azidomethyl)oxetane/tetrahydrofuran (BAMO/THF) copolymer in a temperature‐programmed mode have been investigated by means of DSC, TG‐DTG, fast and lower thermolysis/FTIR and TG‐MS. The reaction mechanism was proposed. The apparent activation energy and pre‐exponential constant of exothermic decomposition reaction of the compound at 0.1 MPa are 167.04 kJ*mol^?1 and 10^14.41 s^?1, respectively. The corresponding critical temperatures of thermal explosion obtained from the onset temperature ^T_c, and the peak temperature T_p are 223.20 and 245.78°C, respectively. The kinetic equation of the exothermic decomposition process of BAMO/THF at 0.1 MPa could be expressed as: $ \frac{{{\rm d}\alpha }}{{{\rm d}T}} = 10^{15.19} \left{ - \ln (1 - \alpha)} \right]^{\frac{2}{3}} e^{ - 2.009 \times 10^4 /T} $.