HMX级配对醇醛高聚物粘结炸药流变性能的影响

Effects of HMX Gradation on the Rheological Properties of the Aldol Based Polymer Bonded Explosive

为了探索HMX颗粒级配对醇醛浇注型高聚物粘结炸药流变性能的影响,采用幂律模型和卡森模型,研究了HMX不同颗粒配比下的物料状态。结果表明,该物料属于具有触变性的假塑性流体。非牛顿指数n值与小颗粒含量呈负相关。低剪切速率(2.15 s^(-1))时,物料粘度随小颗粒含量增加出现极大值。高剪切速率(53.85 s-1)时,物料粘度与小颗粒含量呈正线性关系。物料的屈服值与小颗粒含量负相关,且中颗粒含量对物料屈服值的影响最显著。认为,n值越大、粘度越小、屈服值越低的物料流变性能更好。

To explore the effect of HMX gradation on the rheological properties of the aldol based polymer bonded explosive, the material state under different HMX particle gradation ratio was investigated by power law model and Casson model. The results show that the material is a pseudoplastic fluid with thixotropy. The non-Newtonian index （n value） is negatively correlated with the content of small particles. The viscosity of the material has the maximum value at low shear rate of 2.15 s^-1 and positive linear relationship at high shear rate of 53.85 s^-1 with the small particles content. The yield value of the material is negatively correlated with the content of small particles. Moreover, the content of the middle particles has the greatest effect on the yield value. Considering that the material with higher n value, lower viscosity and lower yield value has the better rheological properties.