Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants
To enhance both the mechanical properties of hydroxyl-terminated polybutadiene (HTPB) binder and the combustion efficiency of aluminized propellants, 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol (OFHD) was employed as a chain extender to impart mechanical regulation to the HTPB binder. Mechanical testi...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/14/3/258 |
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| author | Yanjie Huang Kanghua Chang Jie Yao Xueyong Guo Chen Shen Shi Yan |
| author_facet | Yanjie Huang Kanghua Chang Jie Yao Xueyong Guo Chen Shen Shi Yan |
| author_sort | Yanjie Huang |
| collection | DOAJ |
| description | To enhance both the mechanical properties of hydroxyl-terminated polybutadiene (HTPB) binder and the combustion efficiency of aluminized propellants, 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol (OFHD) was employed as a chain extender to impart mechanical regulation to the HTPB binder. Mechanical testing showed that the mechanical properties of fluoride-modified HTPB polyurethane (FPU) were significantly improved: the peak tensile strength of the optimized samples reached 1.99 MPa, and the elongation at break attained 486%. The structural characterization of the FPUs was conducted using Fourier transform infrared (FTIR) spectroscopy. Thermogravimetry-mass spectrometer (TG-MS) analysis revealed that the initial thermal decomposition temperature of the FPU shifted from 170 °C to 162 °C, accompanied by the release of fluorine-containing fragments during decomposition. Analysis of the combustion residue indicated that the addition of OFHD can reduce the agglomeration of aluminum (Al) powder in aluminized propellants. Dynamic pressure characteristics results showed an augmented pressurization rate under argon and oxygen atmospheres, increased by 18.67% and 37.29%, respectively. Heat release tests indicated that the aluminized propellants with the addition of OFHD had a higher combustion heat, being increased by 6.57%. The binder system is expected to be applied in aluminized propellants to improve the mechanical properties and combustion efficiency of Al powder. |
| first_indexed | 2024-04-24T18:25:05Z |
| format | Article |
| id | doaj.art-e7a9b3cab1cd4bc5bd9bc9393def2c5c |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-24T18:25:05Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj.art-e7a9b3cab1cd4bc5bd9bc9393def2c5c2024-03-27T13:32:30ZengMDPI AGCrystals2073-43522024-03-0114325810.3390/cryst14030258Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized PropellantsYanjie Huang0Kanghua Chang1Jie Yao2Xueyong Guo3Chen Shen4Shi Yan5State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, ChinaTo enhance both the mechanical properties of hydroxyl-terminated polybutadiene (HTPB) binder and the combustion efficiency of aluminized propellants, 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol (OFHD) was employed as a chain extender to impart mechanical regulation to the HTPB binder. Mechanical testing showed that the mechanical properties of fluoride-modified HTPB polyurethane (FPU) were significantly improved: the peak tensile strength of the optimized samples reached 1.99 MPa, and the elongation at break attained 486%. The structural characterization of the FPUs was conducted using Fourier transform infrared (FTIR) spectroscopy. Thermogravimetry-mass spectrometer (TG-MS) analysis revealed that the initial thermal decomposition temperature of the FPU shifted from 170 °C to 162 °C, accompanied by the release of fluorine-containing fragments during decomposition. Analysis of the combustion residue indicated that the addition of OFHD can reduce the agglomeration of aluminum (Al) powder in aluminized propellants. Dynamic pressure characteristics results showed an augmented pressurization rate under argon and oxygen atmospheres, increased by 18.67% and 37.29%, respectively. Heat release tests indicated that the aluminized propellants with the addition of OFHD had a higher combustion heat, being increased by 6.57%. The binder system is expected to be applied in aluminized propellants to improve the mechanical properties and combustion efficiency of Al powder.https://www.mdpi.com/2073-4352/14/3/258fluoroalcohol chain extenderHTPB bindermechanical propertythermal decompositionaluminized propellantscombustion performance |
| spellingShingle | Yanjie Huang Kanghua Chang Jie Yao Xueyong Guo Chen Shen Shi Yan Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants Crystals fluoroalcohol chain extender HTPB binder mechanical property thermal decomposition aluminized propellants combustion performance |
| title | Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants |
| title_full | Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants |
| title_fullStr | Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants |
| title_full_unstemmed | Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants |
| title_short | Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants |
| title_sort | effect of fluoroalcohol chain extension modified htpb binder on the combustion performance of aluminized propellants |
| topic | fluoroalcohol chain extender HTPB binder mechanical property thermal decomposition aluminized propellants combustion performance |
| url | https://www.mdpi.com/2073-4352/14/3/258 |
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