Interaction Mechanism of Composite Propellant Components under Heating Conditions
To examine the interactions between two binder systems—hydroxyl-terminated polybutadiene (HTPB) and hydroxyl-terminated block copolyether prepolymer (HTPE)—as well as between these binders and ammonium perchlorate (AP) at various temperatures for their susceptibility to varying degrees of thermal da...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/11/2485 |
| _version_ | 1797596882008014848 |
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| author | Jiahao Liang Jianxin Nie Haijun Zhang Xueyong Guo Shi Yan Ming Han |
| author_facet | Jiahao Liang Jianxin Nie Haijun Zhang Xueyong Guo Shi Yan Ming Han |
| author_sort | Jiahao Liang |
| collection | DOAJ |
| description | To examine the interactions between two binder systems—hydroxyl-terminated polybutadiene (HTPB) and hydroxyl-terminated block copolyether prepolymer (HTPE)—as well as between these binders and ammonium perchlorate (AP) at various temperatures for their susceptibility to varying degrees of thermal damage treatment, the thermal characteristics and combustion interactions of the HTPB and HTPE binder systems, HTPB/AP and HTPE/AP mixtures, and HTPB/AP/Al and HTPE/AP/Al propellants were studied. The results showed that the first and second weight loss decomposition peak temperatures of the HTPB binder were, respectively, 85.34 and 55.74 °C higher than the HTPE binder. The HTPE binder decomposed more easily than the HTPB binder. The microstructure showed that the HTPB binder became brittle and cracked when heated, while the HTPE binder liquefied when heated. The combustion characteristic index, <i>S</i>, and the difference between calculated and experimental mass damage, ΔW, indicated that the components interacted. The original <i>S</i> index of the HTPB/AP mixture was 3.34 × 10<sup>−8</sup>; <i>S</i> first decreased and then increased to 4.24 × 10<sup>−8</sup> with the sampling temperature. Its combustion was initially mild, then intensified. The original <i>S</i> index of the HTPE/AP mixture was 3.78 × 10<sup>−8</sup>; <i>S</i> increased and then decreased to 2.78 × 10<sup>−8</sup> with the increasing sampling temperature. Its combustion was initially rapid, then slowed. Under high-temperature conditions, the HTPB/AP/Al propellants combusted more intensely than the HTPE/AP/Al propellants, and its components interacted more strongly. A heated HTPE/AP mixture acted as a barrier, reducing the responsiveness of solid propellants. |
| first_indexed | 2024-03-11T02:59:01Z |
| format | Article |
| id | doaj.art-da7d9a14673147aead0079b0656b8755 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T02:59:01Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-da7d9a14673147aead0079b0656b87552023-11-18T08:26:08ZengMDPI AGPolymers2073-43602023-05-011511248510.3390/polym15112485Interaction Mechanism of Composite Propellant Components under Heating ConditionsJiahao Liang0Jianxin Nie1Haijun Zhang2Xueyong Guo3Shi Yan4Ming Han5State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaXi’an Modern Control Technology Research Institute, Xi’an 710065, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaThe Eighth Military Representative Office of Air Force Equipment Ministry, Beijing 100843, ChinaTo examine the interactions between two binder systems—hydroxyl-terminated polybutadiene (HTPB) and hydroxyl-terminated block copolyether prepolymer (HTPE)—as well as between these binders and ammonium perchlorate (AP) at various temperatures for their susceptibility to varying degrees of thermal damage treatment, the thermal characteristics and combustion interactions of the HTPB and HTPE binder systems, HTPB/AP and HTPE/AP mixtures, and HTPB/AP/Al and HTPE/AP/Al propellants were studied. The results showed that the first and second weight loss decomposition peak temperatures of the HTPB binder were, respectively, 85.34 and 55.74 °C higher than the HTPE binder. The HTPE binder decomposed more easily than the HTPB binder. The microstructure showed that the HTPB binder became brittle and cracked when heated, while the HTPE binder liquefied when heated. The combustion characteristic index, <i>S</i>, and the difference between calculated and experimental mass damage, ΔW, indicated that the components interacted. The original <i>S</i> index of the HTPB/AP mixture was 3.34 × 10<sup>−8</sup>; <i>S</i> first decreased and then increased to 4.24 × 10<sup>−8</sup> with the sampling temperature. Its combustion was initially mild, then intensified. The original <i>S</i> index of the HTPE/AP mixture was 3.78 × 10<sup>−8</sup>; <i>S</i> increased and then decreased to 2.78 × 10<sup>−8</sup> with the increasing sampling temperature. Its combustion was initially rapid, then slowed. Under high-temperature conditions, the HTPB/AP/Al propellants combusted more intensely than the HTPE/AP/Al propellants, and its components interacted more strongly. A heated HTPE/AP mixture acted as a barrier, reducing the responsiveness of solid propellants.https://www.mdpi.com/2073-4360/15/11/2485composite propellantthermal damage treatmentthermal weight lossinteractioncombustion characteristics |
| spellingShingle | Jiahao Liang Jianxin Nie Haijun Zhang Xueyong Guo Shi Yan Ming Han Interaction Mechanism of Composite Propellant Components under Heating Conditions Polymers composite propellant thermal damage treatment thermal weight loss interaction combustion characteristics |
| title | Interaction Mechanism of Composite Propellant Components under Heating Conditions |
| title_full | Interaction Mechanism of Composite Propellant Components under Heating Conditions |
| title_fullStr | Interaction Mechanism of Composite Propellant Components under Heating Conditions |
| title_full_unstemmed | Interaction Mechanism of Composite Propellant Components under Heating Conditions |
| title_short | Interaction Mechanism of Composite Propellant Components under Heating Conditions |
| title_sort | interaction mechanism of composite propellant components under heating conditions |
| topic | composite propellant thermal damage treatment thermal weight loss interaction combustion characteristics |
| url | https://www.mdpi.com/2073-4360/15/11/2485 |
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