火炸药学报2026，Vol.49Issue(8)：900-906,7.DOI:10.14077/j.issn.1007-7812.202510020
TNT/TNB及TNT/BTF共晶结晶动力学研究
Study on the Crystallization Kinetics of TNT/TNB and TNT/BTF Cocrystals
摘要
Abstract
To study the structural recoverability and non-isothermal crystallization kinetics of 2,4,6-trinitrotoluene/1,3,5-tri-nitrobenzene(TNT/TNB)cocrystal and TNT/benzotrifuroxan(TNT/BTF)cocrystal subjected to melt-cooling cycles,cocrystal samples were initially prepared via the melt-casting method.Powder X-ray diffraction and variable-temperature X-ray diffrac-tion were employed to monitor structural evolution,while differential scanning calorimetry(DSC)was used to characterize thermal and crystallization behaviors.The results reveal that after repeated melting and solidification,the TNT/TNB cocrystal consistently exhibits the same melting temperature(62 ℃)and crystallization temperature(32 ℃).Similarly,the TNT/BTF cocrystal also retains its melting temperature(132 ℃)and crystallization temperature(58 ℃),demonstrating that both co-crystals can faithfully reconstruct their original cocrystalline phases upon melt recrystallization.Kinetic analysis using the Avrami equation modified by the Jeziorny method yields Avrami exponents of 2.40 for TNT/TNB cocrystal and 2.20 for TNT/BTF co-crystal,indicating essentially identical growth mechanisms:a mixed mode between two-and three-dimensional growth,exhibi-ted by rapid nucleation followed by a prolonged crystal growth stage.Furthermore,the Mo's equation was applied to analyze the crystallization kinetics.The resulting parameters show that the crystallization rates of both cocrystals decrease with increas-ing relative crystallinity.关键词
有机化学/TNT/TNB共晶/TNT/BTF共晶/熔融结晶/结晶动力学Key words
organic chemistry/TNT/TNB cocrystal/TNT/BTF cocrystal/melt crystallization/crystallization kinetics分类
军事科技引用本文复制引用
宁霆曜,杨宗伟,于雁武..TNT/TNB及TNT/BTF共晶结晶动力学研究[J].火炸药学报,2026,49(8):900-906,7.基金项目
国家自然科学基金(No.22275175) （No.22275175）
中华人民共和国公安部重点实验室基金(No.2024FMKFKT01) （No.2024FMKFKT01）
