Effect of azide polyether pyrolysis property on combustion and heat release of boron-based fuel-rich propellant

Zhang, Ximing; Wu, Wei; Jin, Peng; Ding, Shanjun; Liu, Shuang; Yang, Wei; Liu, Wenhao; Luo, Yunjun

doi:10.1016/j.combustflame.2022.112269

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…The reaction rate of energetic material is characterized by the combustion rate of the energetic material or the pressurization rate in a closed container [33][34][35]. The pressuretime curves of the samples during combustion in different atmospheres were measured by means of a closed combustion tank device to obtain the peak pressure of combustion and the rate of pressurization Figure 9.…”

Section: Dynamic Pressure Characteristics and Heat Releasementioning

confidence: 99%

Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants

Huang,

Chang,

Yao

et al. 2024

Crystals

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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.

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Section: Dynamic Pressure Characteristics and Heat Releasementioning

confidence: 99%

Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants

Huang,

Chang,

Yao

et al. 2024

Crystals

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“…The fuel-rich propellants based on AlÀ Mg were prepared by the solvent extrusion method [19]: the energetic thermoplastic polymer (2.0 g) obtained by synthesis was dissolved in THF, followed by the addition of 2.0 g of Al powder, 2.0 g of magnesium powder, and 4.0 g of AP; the mixture was heated under vacuum at 60 °C for 5 hours to remove THF and repeatedly pressed in a rotating roller to obtain the fuel-rich propellants based on AlÀ Mg. The propellants were named as 85GAP-Prop, 80GAP-Prop, 75GAP-Prop, and 70GAP-Prop, respectively.…”

Section: Preparation Of Gap-ipdi Energetic Thermoplastic Polymer and ...mentioning

confidence: 99%

Enhanced combustion characteristics of fuel‐rich propellant based on Al−Mg via GAP‐IPDI energetic thermoplastic polymer

Luo

Zhang

Jin

et al. 2023

Propellants Explo Pyrotec

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In this work, the energetic thermoplastic polymers were synthesized with different ratios of energetic prepolymer glycidyl azide (GAP) and isophorone diisocyanate (IPDI), and used as the binder to prepare fuel‐rich propellants based on Al−Mg. The results showed that energetic thermoplastic polymer enabled the fuel‐rich propellant a faster flame spread, greater flame strength, and a stronger injection effect of metal droplets. The weight loss (Δm) of the propellants increased with GAP content, while the weight loss rate (Dmax) increased similarly. The Δm increased from 7.92 % to 9.86 % and Dmax from −0.23 % ⋅ °C−1 to −0.35 % ⋅ °C−1 in the range 100–256.5 °C. The propellant with the highest GAP content (85GAP‐Prop) had the lowest apparent activation energy (150.77 kJ ⋅ mol−1). The average pressure rate of 85GAP‐Prop burning in a closed bomb reached 7.67 MPa ⋅ s−1 and the maximum instantaneous pressure rate could reach 16.52 MPa ⋅ s−1, significantly higher than the other propellants. The combustion products analysis indicated that the higher GAP content in the GAP‐IPDI energetic thermoplastic polymer more significantly reduced the agglomeration of Al particles and improved the loosening of the combustion products. The rapid combustion gas generation characteristic and energy release of energetic thermoplastic polymer enhanced the combustion characteristics of the fuel‐rich propellant based on Al−Mg, which promoted dispersion level between the metal droplets. This work provides insight into the combustion principles and performance improvements of fuel‐rich propellant based on Al−Mg.

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Elucidating the impact of sodium azide on the thermal and combustion characteristics of boron-based fuel-rich propellants

Facih,

Boulkadid,

Touidjine

et al. 2024

Reac Kinet Mech Cat

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Effect of azide polyether pyrolysis property on combustion and heat release of boron-based fuel-rich propellant

Cited by 6 publications

References 38 publications

Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants

Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants

Enhanced combustion characteristics of fuel‐rich propellant based on Al−Mg via GAP‐IPDI energetic thermoplastic polymer

Elucidating the impact of sodium azide on the thermal and combustion characteristics of boron-based fuel-rich propellants

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