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| Effect of NG/NC Matrix on the Mechanical Sensitivity of AP/CMDB Propellant |
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| DOI：10.7643/issn.1672-9242.2022.10.003 |
| KeyWord:NG NC matrix propellant friction sensitivity impact sensitivity |
| Author | Institution |
| DENG Chong-qing |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| DANG Yong-zhan |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| XU Hui-xiang |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| YU Hong-jian |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| ZHANG Zheng-zhong |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| PANG Wei-qiang |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
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| Abstract: |
| The paper aims to study the effect of nitrocellulose matrix plasticized by nitroglycerin on the mechanical sensitivity of AP/CMDB propellant. The NG/NC matrix and AP/CMDB propellant samples were respectively prepared by roll calender and plunger extruder. Impact sensitivity and friction sensitivity of them were tested. Impact sensitivity of NG/NC matrix decreased 53% when NG mass fraction was reduced to 37.5% from 41.5%, but increased 46.9% when superfine AP was added in. Spherical Al powder was added in after, the uniformity of AP dispersion and NG/NC bond evidently increased, impact intensity of the AP/CMDB propellant also increased, impact sensitivity and friction sensitivity respectively decreased 44.4% and 20.0%. The mechanical sensitivity AP/CMDB propellant has apparently relations with its microstructure, it is raised up by adding into superfine AP powder as the agglomeration of AP and depressed down by adding spherical Al powder as the modification of dispersion uniformity of AP and Al particles. |
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