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| Effect of Natural Aging on Compatibility of FOX-7 Based Binary Mixtures |
| Received:December 30, 2023 Revised:January 24, 2024 |
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| DOI：10.7643/issn.1672-9242.2024.02.003 |
| KeyWord:compatibility aging FOX-7 energetic materials inert materials storage stability |
| Author | Institution |
| LI Jian |
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing , China |
| LI Yaning |
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing , China |
| CHANG Pengcheng |
Shanxi Jiangyang Chemical Engineering Co., Ltd., Taiyuan , China |
| WANG Boliang |
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing , China |
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| Abstract: |
| The work aims to understand how natural aging affects the compatibility of 1,1-diamino-2,2-dinitroethane (FOX-7) based binary mixtures, and reveal the potential impact of aging on their compatibility. In the work, thermal analysis techniques (Differential Scanning Calorimetry, DSC) and non-thermal analysis techniques (Fourier Transform Infrared Spectroscopy, FTIR) were employed to assess the thermal decomposition characteristics and molecular structural features of FOX-7 based binary mixtures before and after aging. DSC was used to measure the initial decomposition peak temperature of the mixtures and pure FOX-7. A comprehensive assessment on the compatibility of FOX-7 with eight energetic materials and four inert materials was conducted, supplemented by FTIR results to explain the molecular structural changes in the mixtures. The DSC thermograms showed that except for the FOX-7/RDX mixture, all other studied objects exhibited good compatibility before and after aging. However, mixtures represented by FOX-7/CL-20 showed significant changes in the maximum exothermic peak temperature after aging, indicating that aging affected the compatibility of these mixtures. The functional group changes observed in the FTIR spectral analysis further suggested that chemical reactions occurred in the binary systems comprising FOX-7 and RDX, CL-20, AP, HTPB, DOS, or WAX during the aging process. The findings of this study are significant for understanding and assessing the impact of aging on the compatibility of FOX-7 based binary mixtures, and can guide the safe design for long-term storage and use of FOX-7 based energetic materials. |
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