含能材料Issue(6)：767-773,7.DOI:10.11943/j.issn.1006-9941.2014.06.011
DNGTz的非等温热分解动力学及热安全性
Non-isothermal Thermal Decomposition Kinetics and Thermal Safety of DNGTz
摘要
Abstract
The compound 3,6-bis-nitroguanyl-1,2,4,5-tetrazin(DNGTz)was synthesized and its thermal behavior was studied by differential scanning calorimetry( DSC)and thermogravity( TG-DTG). The data in DSC curve were used to analyze the thermal decomposition mechanism and kinetics using the methods of Kissinger,Ozawa and integral. Therefore,the thermal kinetic param-eters of the activation energy and pre-exponential factor were obtained as 187.23kJ·mol-1 and 1015.01s-1,respectively. The ther-mal decomposition mechanism is phase boundary reaction and the differential function is f(α)=1. Then,the thermal safety of DNGTz,the density(ρ=1.762 g·cm-3)and thermal conductivity(λ= 0.1856 W·m-1·K-1)were estimated and the specific heat capacity( cp ) was measured to obtain the equation of cp with T in a micro-calorimetry( Micro-DSCIII) which is cp (J·g-1·K-1)=-2.8805+2.1283×10-2T-2.3132×10-5T2-1.1689×10-8T3(287K<T<352K). Then,the thermal decomposition kinetic parameters,mechanism function and the equation of cp ,ρ and λ were combined to evaluate the adiabatic-time-to-explosion (tTIad= 8. 16 s),the self-accelerating decomposition temperature(TSADT =249. 12 ℃),the thermal ignition temperature(Tbe =262.31 ℃)and the critical temperature of thermal explosion(Tbp=277.68 ℃),thermal sensitivity probability density function S(T) vs T for DNGTz(infinite cylindrical,spheroidic or infinite platelike)with the radius of 1m surrounded with 300K,the peak tempera-ture(TS(T)max),safety degree(SD),critical thermal explosion ambient temperature(Tacr)and thermal explosion probability(PTE). The thermal safety of the spheroidic sample is found to be better than that of the infinite cylindrical or infinite platelike sample.关键词
物理化学/3,6-二硝基胍基-1,2,4,5-四嗪(DNGTz)/非等温热分解动力学/热安全性/热爆炸Key words
physical chemistry/3,6-bis-nitroguanyl-s-tetrazin(DNGTz)/non-isothermal thermal decomposition kinetics/thermal safety/thermal explosion分类
军事科技引用本文复制引用
胡拥鹏,赵旭芳,赵宁宁,严彪,高红旭,赵凤起,胡荣祖,宋纪蓉,马海霞..DNGTz的非等温热分解动力学及热安全性[J].含能材料,2014,(6):767-773,7.基金项目
国家自然科学基金（21073141，21373161）；教育部新世纪优秀人才支持计划 （）
