Rheological properties and curing kinetics of GAP-based propellant slurries

FirePhysChem Pub Date : 2023-11-04 DOI:10.1016/j.fpc.2023.11.001

Yi Wang , Yana Wang , Xiaolan Song , Chongwei An , Fengsheng Li

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Abstract

The rheological properties and isothermal curing kinetics of the GAP/AN/HMX propellant slurries were investigated by steady rheological measurements and isothermal rheological measurements, and subsequently, the rheological model and the curing kinetics equation of the slurries were constructed, respectively. The results indicate that the GAP/AN/HMX propellant slurries are Carreau–Yasuda fluids, and the apparent viscosity of the slurries gradually decreases with the increase in shear rate and temperature. The storage modulus and loss modulus of the slurries show an "S" growth with the curing reaction, and the higher temperature causes a significant reduction in the time required for complete curing of the slurries. The pot-lifes of the slurries at 55 °C, 60 °C and 65 °C are 52590 s, 19820 s, 18150 s, respectively, with a noticible decrease with increasing temperature. Furthermore, the curing reaction of the slurries is viewed as an autocatalytic reaction, and the corresponding curing degrees (α_max) at the maximum curing rate are 0.3481 (55 °C), 0.3536 (60 °C), and 0.4420 (65 °C), respectively.

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基于 GAP 的推进剂浆料的流变特性和固化动力学

通过稳定流变测量和等温流变测量研究了 GAP/AN/HMX 推进剂浆料的流变特性和等温固化动力学，并分别建立了浆料的流变模型和固化动力学方程。结果表明，GAP/AN/HMX 推进剂浆料是 Carreau-Yasuda 流体，浆料的表观粘度随剪切速率和温度的增加而逐渐降低。泥浆的储存模量和损耗模量随固化反应呈 "S "型增长，温度升高可显著缩短泥浆完全固化所需的时间。泥浆在 55 ℃、60 ℃ 和 65 ℃ 下的固化寿命分别为 52590 秒、19820 秒和 18150 秒，随着温度的升高，固化寿命明显缩短。此外，泥浆的固化反应被视为一种自催化反应，在最大固化速率下，相应的固化度（αmax）分别为 0.3481（55 °C）、0.3536（60 °C）和 0.4420（65 °C）。

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来源期刊

FirePhysChem

CiteScore

1.40

自引率

0.00%

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