温轮胶对铵胺炸药流变性和抗水性的影响OA

To study the effects of Welan gum on the rheological properties,water resistance and other physical properties of ammonium amine explosives,ammonium amine explosive samples with Welan gum mass fractions of 0.7％,0.9％,1.1％,and 1.3％were prepared using Welan gum particles with a particle size of 300-500μm.The viscosity,fluidity,viscoelastic-ity,and viscosity-temperature characteristics of the matrix were tested using a rotational rheometer.The distribution and chan-ges in sensitizing bubbles were characterized through microscope observation and image analysis.The water resistance of each sample was evaluated using the conductivity method.The results showed that the ammonium amine explosive matrix is a strongly shear-thinning fluid.When the mass fraction of Welan gum addition was 0.9％—1.1％,the matrix exhibited suitable viscosity and pumpability,with the transition point between storage modulus and loss modulus corresponding to a shear strain of approximately 18％.At this point,the sensitizing bubbles in the explosive samples were uniformly distributed,and the water resistance was optimal(conductivity of approximately 1.4mS/cm),significantly outperforming the samples with Welan gum mass fractions of 0.7％and 1.3％(conductivities of 2.5 mS/cm and 3.3 mS/cm,respectively).Furthermore,the addition of Welan gum significantly reduced the effect of temperature on the matrix viscosity.The study indicates that adding 0.9％—1.1％Welan gum can effectively improve the rheological and water-resistant properties of ammonium outperforming explo-sives,as well as enhance the bubble stability.