H2BTA的非等温热分解特性

摘要

To detailedly understand the non isothermal thermal decomposition characteristics of N,N-bis-(1 (2)H tetrazol-5-yl)amine (H2BTA),the thermal decomposition characteristics at different heating rates and types of decomposition gas products and their content change for this compound were measured by means of TG-DSC-FTIR-MS and its thermal decomposition mechanism was analyzed.The results show that with the increase of temperature,the thermal decomposition of H2 BTA is divided into three successive processes:broking of tetrazole rings of the molecule began to release N2 mainly with the rapture of bond,the further rapture of bond in skeleton and release of N2,and the decomposition of residual skeleton with the expulsion of N2,NH3,HN3 and HCN.The apparent activation energies of the three processes are 187.19,142.32 and 198.93kJ/mol,respectively.%为详细了解N,N-二(1(2)氢-5-四唑基)胺(H2BTA)的非等温热分解特性,用热重-差式扫描量热-傅里叶红外光谱-质谱联用(TG-DSC-FTIR-MS)测定了该化合物在不同升温速率下的热分解特性、分解气体产物的种类及其含量变化,并分析了其热分解机理.结果表明,随着温度的升高,H2BTA的热分解分为3个连续的过程:(1)以-N-N-键断裂脱除N2为主的分子中四唑环裂解;(2)骨架中-N-N-键的进一步断裂释放N2;(3)剩余骨架裂解产生N2、NH3、HN3和HCN.3个分解过程表观活化能分别为187.19、142.32和198.93 kJ/mol.