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A Simple Method Based on Harcourt‐Esson's Equation to Estimate the Critical Temperature of Thermal Explosion for Energetic Materials Using Non‐isothermal DSC
Author(s) -
ZHAO Fengqi,
HU Rongzu,
GAO Hongxu
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990178
Subject(s) - chemistry , isothermal process , thermodynamics , kinetic energy , simple (philosophy) , thermal , value (mathematics) , physics , statistics , classical mechanics , mathematics , philosophy , epistemology
A method for estimating the critical temperature ( T b ) of thermal explosion for energetic materials was derived from Semenov's thermal explosion theory and the non‐isothermal kinetic equation d α /d t = A 0 T α f ( α ) based on Harcourt‐Esson's expression using reasonable hypotheses. The final formula is T b = αT e0 /( α −1), which is simple. The onset temperature ( T ei ) can be easily obtained from the non‐isothermal DSC curves, the value of T e0 can from the equation T ei = T e0 + α 1 β 1 + α 1 β i 2 + α 1 β i 3 , the values of α can from the equation: ln β i =ln[ A 0 /( a +1)G( α )+( a +1)ln T i ], and then the value of T b can be calculated. The result obtained with this method coincides completely with the value of T b obtained by Zhang‐Hu‐Xie‐Li's method.