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| Aging Mechanism for Microscopic Damage of HTPB Propellant at Ambient Temperature |
| Received:January 15, 2018 Revised:April 15, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.04.006 |
| KeyWord:solid propellant storage aging micro-damage |
| Author | Institution |
| WEI Xiao-qin |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
| LONG Shi-teng |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
| FU Zhao-xu |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
| HUANG Bo |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
| LI Hong-ying |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
| ZHANG Lun-wu |
Natural Environmental Test and Research Center of Science, No.59 Institute of Ordnance Industry China, Chongqing , China |
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| Abstract: |
| Objective To study the aging mechanism of HTPB propellant at ambient temperature. Methods High temperature accelerated aging test was carried out in the complex solid propellant laboratory to analyze change rules of chemical functional groups and loss factors in different extent of injury and deduce the microscopic damage mechanism at ambient temperature comprehensively. Results At the ambient temperature, oxidizer AP always released active ingredients to attack the main chain of HTPB binder to form a cross-linked polymer and then generate multiple oxides such as peroxide, aldehyde and ester. In the later state of aging, main chain of HTPB binder would be degraded in R—CO—NH or C=C and then the content of R—CO—NH or C=C decreased with the passing of time. Conclusion At the ambient temperature, both cross-linked reaction and degradation reaction of solid propellant occur during the whole process when cross-linked reaction is dominant in the initial stage and degradation reaction plays a leading role in the later stage of aging. |
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