Modification of Hydroxyl-terminated Polyether Binder by Liquid Fluororubber and Its Effect on Thermal Oxidation Behavior of Aluminum Powder

被引：0

作者：

Shen C. ^{[1
]}

Yan S. ^{[1
]}

Yao J. ^{[1
]}

Jiao Q. ^{[1
]}

Liao M. ^{[2
]}

Chang Y. ^{[2
]}

机构：

[1] State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing

[2] College of Transportation Engineering, Dalian Maritime University, Dalian

来源：

Binggong Xuebao/Acta Armamentarii | 2022年 / 43卷 / 04期

关键词：

Aluminum powder; Hydroxyl-terminated polyether; Liquid fluororubber; Oxidizability; Thermal stability;

D O I：

10.12382/bgxb.2021.0184

中图分类号：

学科分类号：

摘要：

The combustion of aluminum powder promoted by fluoride is a hot spot in the field of energetic materials in recent years. Hydroxyl terminated liquid fluororubber with high fluorine content is selected as fluorine source, which is introduced into hydroxyl-terminated polyether (HTPE) adhesive system to prepare modified HTPE films with different fluorine rubber contents.The morphology, mechanical properties, thermal stability and oxidizability of the modified HTPE films were tested and analyzed. The results show that the mechanical properties of the film decrease first and then increase with the increase in fluororubber content. The tensile strength and elongation at break of the film with fluororubber content of 50 wt% are 2.51 MPa and 217%, respectively. Compared with the unmodified HTPE film, its tensile strength is increased by 83%, and its elongation at break is decreased by 17%. Liquid fluororubber promotes the decomposition of HTPE polyurethane adhesive, and the initial decomposition temperature shifts from 263 ℃ to 209 ℃. The fluorine-containing oxidizing gas decomposed by the modified adhesive reacts with the alumina shell of aluminum powder to form AlF3, which promotes the release of internal active aluminum core. © 2022, Editorial Board of Acta Armamentarii. All right reserved.

引用

页码：780 / 787

页数：7

共 29 条

[21] LI D H, LIAO M Y., Study on the dehydrofluorination of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) copolymer, Polymer Degradation and Stability, 152, pp. 116-125, (2018)
[22] LI D H., Preparation, curing, structure and properties of end-functionalized liquid fluororubbers, (2018)
[23] WEN X M, ZHANG G P, CHEN K K, Et al., Enhancing the performance of an HTPE binder by adding a novel hyperbranched multi-arm azide copolyether[J], Propellants, Explosives, Pyrotechnics, 45, 7, pp. 1065-1076, (2020)
[24] MANSON J A, SPERLING L H., Polymer blends and composites, (2012)
[25] CHANG G J., Concise handbook of common data for rubber, (2012)
[26] YANG C C., Study on properities and application of GAP binder systems modified by HTPE, pp. 17-65, (2016)
[27] YAN T., Fabrication and thermal reaction characteristics of nano-aluminum based energetic composites, (2020)
[28] RIELLO D, ZETTERSTROM C, PARR C, Et al., AlF3 reaction mechanism and its influence on α-Al2O3 mineralization, Ceramics International, 42, 8, pp. 9804-9814, (2016)
[29] TRUNOV M A, SCHOENITZ M, ZHU X Y, Et al., Effect of polymorphic phase transformations in Al2O3 film on oxidation kinetics of aluminum powders, Combustion and Flame, 140, 4, pp. 310-318, (2005)

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