Crystal Structures, Thermal Behavior Analysis and Thermal Safety of Two Energetic Salts of Hydrazinyl-1,2,4,5-tetrazine with 3,5-Dinitrosalicylic Acid  

作　　者：CHEN Xiang ZENG Tian GUO Zhaoqi LI Shuailei MAI Tao GAO Rong MA Haixia 

机构地区：[1]School of Chemieal Engineering, Northwest University, Xi 'an 710069, P. R. China [2]College of Chemistry and Materials Science, Northwest University, Xi 'an 710069, P. R. China

出　　处：《Chemical Research in Chinese Universities》2018年第6期959-964,共6页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.21673179,21504067） and the National Students＇ Innovation and Entrepreneurship Training Program, China（No.201710697038）.

摘　　要：Two energetic salts, DPHT.DNS-H20（1） and DHT.2DNS.2H20（2）[DPHT=3-（3,5-dimethyl-lH-pyrazol- 1-yl）-6-hydrazinyl-1,2,4,5-tetrazine; DHT=3,6-dihydrazinyl-l,2,4,5-tetrazine], were synthesized from S-tetrazine with 3,5-dinitrosalicylic acid（DNS）. Compounds 1 and 2 were structurally characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. The thermal behavior of the title compounds was studied by differential scanning calorimetry（DSC） and thermogravimetry（TG）. The non-isothermal decomposition kinetics of compound 2 were investigated. The self-accelerating decomposition temperature, thermal ignition temperature, and critical temperatures of thermal explosion were obtained to evaluate the thermal safety of compound 2. The results show compounds 1 and 2 decompose at 150.8 and 179.2℃, respectively. The TSADT and Tb of compound 2 are higher than those of DHT, which indicates compound 2 is a potential candidate for energetic materials that have good thermal stability. Keywords Tetrazine compound; Dinitrosalicylic acid（DNS）; Crystal structure; Thermal behavior; Thermal safetyTwo energetic salts, DPHT.DNS-H20（1） and DHT.2DNS.2H20（2）[DPHT=3-（3,5-dimethyl-lH-pyrazol- 1-yl）-6-hydrazinyl-1,2,4,5-tetrazine; DHT=3,6-dihydrazinyl-l,2,4,5-tetrazine], were synthesized from S-tetrazine with 3,5-dinitrosalicylic acid（DNS）. Compounds 1 and 2 were structurally characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. The thermal behavior of the title compounds was studied by differential scanning calorimetry（DSC） and thermogravimetry（TG）. The non-isothermal decomposition kinetics of compound 2 were investigated. The self-accelerating decomposition temperature, thermal ignition temperature, and critical temperatures of thermal explosion were obtained to evaluate the thermal safety of compound 2. The results show compounds 1 and 2 decompose at 150.8 and 179.2℃, respectively. The TSADT and Tb of compound 2 are higher than those of DHT, which indicates compound 2 is a potential candidate for energetic materials that have good thermal stability. Keywords Tetrazine compound; Dinitrosalicylic acid（DNS）; Crystal structure; Thermal behavior; Thermal safety

关 键 词：Tetrazine compound Dinitrosalicylic acid（DNS） Crystal structure Thermal behavior Thermal safety 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业] X93[环境科学与工程—安全科学]