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Related Experiment Video

Updated: May 28, 2026

Research and Development of High-performance Explosives
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A Method for Reducing the Temperature Sensitivity of a Single-Base Propellant by Adding Ultra-Fine RDX Particles.

Sihan Zhu1,2, Yingbo Wang1,3, Qixuan Ying1,2

  • 1School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Polymers
|May 27, 2026
PubMed
Summary

Adding ultra-fine RDX particles to single-base propellant reduces temperature sensitivity. This innovation enhances weapon safety and efficiency by stabilizing interior ballistic performance across varying environmental temperatures.

Keywords:
Ultra-fine RDXcombustion performancemodificationsingle-base propellanttemperature sensitivity coefficient

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Ballistics

Background:

  • Temperature sensitivity coefficient significantly impacts propellant charges, causing pressure fluctuations and compromising safety.
  • Variations in environmental temperature can lead to 40-80 MPa fluctuations in maximum chamber pressure.

Purpose of the Study:

  • To develop a single-base propellant with higher energy and a lower temperature sensitivity coefficient.
  • To investigate the effect of adding ultra-fine RDX particles on propellant performance.

Main Methods:

  • Incorporation of ultra-fine RDX particles into a single-base propellant matrix.
  • Microstructural analysis using scanning electron microscopy (SEM).
  • Thermal mechanical analysis (TMA) to assess interface behavior.
  • Closed bomb tests to evaluate burning behavior and temperature sensitivity.

Main Results:

  • Microcracking at RDX-propellant interfaces due to differing thermal expansion coefficients.
  • Increased burning surface area at low temperatures, counteracting reduced reaction rates.
  • SEM and TMA confirmed temperature-dependent interfacial behavior.
  • Modified propellant exhibited stable burning and reduced temperature sensitivity.

Conclusions:

  • The structural interaction between RDX fillers and the propellant matrix effectively lowers the temperature sensitivity coefficient.
  • This approach offers a viable strategy for designing climate-resilient ammunition.
  • The modified propellant demonstrates improved operational safety and efficiency.