Shao Yubao, Xu Siyu, Xu Huixiang, Xie Wuxi, Zhang Zihao, Yao Ergang, Jiang Hanyu
Xi'an Modern Chemistry Research Institute, Xi'an 710065, China.
Molecules. 2025 Apr 29;30(9):1967. doi: 10.3390/molecules30091967.
In order to study the curing process of branched polyazide glycidyl ether (BGAP) binder and its propellant slurry at 50 to 70 °C, the rheological properties of BGAP binder and its propellant slurry were studied by chemical rheology. The results show that the viscosity coefficient of the uncured BGAP decreases gradually when the temperature increases, and when the plasticization ratio is 1.1, the viscosity coefficient of BGAP decreases first and then remains unchanged. After adding the curing agent, the chemical rheology method can be used to calculate whether the BGAP curing system still conforms to the power-law equation in a short time. The kinetic equation of the curing reaction, expressed by apparent viscosity, is deduced from the double Arrhenius equation, which can be expressed by η(T,t) = 10.16 exp (-1.72/T) exp [17.27 t exp (-5.21/T)]. After using BGAP as the adhesive to make a propellant slurry with a liquid material component of 25%, the effect of the particle size of Al powder in the solid filler component on the curing process of the slurry was studied, and the 200 nm Al powder could not be made into a slurry under this formulation. The curing kinetics equations of the slurry with Al powder particle sizes of 5 μm, 15 μm, and 29 μm under this formula were obtained by measuring the viscosity of the slurry over time at 50-70 °C. The results showed that the smaller the Al powder particle size, the lower the viscous flow activation energy of the slurry and the higher the curing reaction activation energy.
为研究支化聚叠氮缩水甘油醚（BGAP）黏合剂及其推进剂浆料在50至70℃下的固化过程，采用化学流变学方法研究了BGAP黏合剂及其推进剂浆料的流变性能。结果表明，未固化的BGAP黏度系数随温度升高逐渐降低，当增塑比为1.1时，BGAP黏度系数先降低后保持不变。加入固化剂后，利用化学流变学方法可在短时间内计算BGAP固化体系是否仍符合幂律方程。由双阿累尼乌斯方程推导出以表观黏度表示的固化反应动力学方程，其表达式为η(T,t)=10.16 exp(-1.72/T) exp[17.27 t exp(-5.21/T)]。以BGAP为黏合剂制备液体材料组分为25%的推进剂浆料后，研究了固体填料组分中Al粉粒径对浆料固化过程的影响，在此配方下200 nm的Al粉无法制成浆料。通过在50 - 70℃下测量浆料黏度随时间的变化，得到此配方下Al粉粒径为5μm、15μm和29μm的浆料固化动力学方程。结果表明，Al粉粒径越小，浆料的黏流活化能越低，固化反应活化能越高。
