Synthesis and Thermal Decomposition of TNPG

Publication date: Available online 5 September 2019Source: Thermochimica ActaAuthor(s): Wen-qian Wu, Wei Feng, Qiu-han Lin, Shun-yao Wang, Zi-chao Guo, Li-ping Chen, Wang-hua ChenAbstract1, 3, 5-Trihydroxy-2, 4, 6-trinitrobenzene (TNPG) is an essential energetic intermediate for synthesis of 1, 3, 5-Triamino-2, 4, 6-Trinitrobenzene (TATB). The thermal stability of TNPG was studied in this work. First, TNPG was synthesized by nitration of 1, 3, 5-trihydroxybenzene with the solution feeding. Then, the thermal stability of TNPG was studied by DSC and ARC experiments. The non-isothermal DSC results indicated that the thermal decomposition of TNPG overlapped with the endothermic melting process. The isothermal DSC and ARC results evidenced that the decomposition of TNPG followed the autocatalytic mechanism. Two different models were constructed to depict the decomposition process of TNPG. By comparison with the isothermal DSC results, it was found that the following model could better describe the decomposition process of TNPG: A→BS (autocatalytic), A→Aliq (melting), Aliq→B (autocatalytic).

Source: Thermochimica Acta - September 6, 2019 Category: Chemistry Source Type: research