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Updated: Jul 1, 2026

Research and Development of High-performance Explosives
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Published on: February 20, 2016

Dynamic molecular simulation for CL-20/3,5-MDNP(1-methyl-3,5-dinitropyrazole) co-crystal PBX explosives.

Xin-Yi Li1, Jia-Yin Wang2, Jin-Qing Zhao3

  • 1School of Mechanical and Electrical Engineering, North University of China, Taiyuan, 030051, China.

Journal of Molecular Modeling
|June 30, 2026
PubMed
Summary
This summary is machine-generated.

This study developed polymer-bonded explosives (PBXs) using a CL-20/3,5-MDNP co-crystal to reduce sensitivity. The CL-20/3,5-MDNP/EVA system showed the best stability and compatibility, while CL-20/3,5-MDNP/PEG offered better initiation performance.

Keywords:
2:1 CL-20/3,5-MDNP eutectic explosiveBinding energy trigger bond lengthMechanical propertiesMolecular dynamics simulationPolymer-bonded explosive

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Computational Chemistry

Background:

  • CL-20/3,5-MDNP co-crystal is a high-energy explosive candidate, but its sensitivity requires mitigation.
  • Developing insensitive high explosives (IHEs) is crucial for safety and performance.
  • Polymer-bonded explosives (PBXs) offer a route to tailor energetic material properties.

Purpose of the Study:

  • To theoretically investigate the impact of different polymer binders on the properties of 2:1 CL-20/3,5-MDNP co-crystal-based PBXs.
  • To identify PBX formulations with improved structural stability, reduced sensitivity, and optimized detonation performance.
  • To evaluate the interfacial compatibility and mechanical properties of various PBX systems.

Main Methods:

  • Construction of a theoretical model for the 2:1 CL-20/3,5-MDNP co-crystal.
  • Deposition of five distinct polymers (BR, EVA, PEG, F2603, PVDF) onto specific crystallographic surfaces.
  • Molecular dynamics (MD) simulations using the COMPASS force field under NPT ensemble at 298 K for 2 ns with a 1 fs time step.

Main Results:

  • The CL-20/3,5-MDNP/EVA system exhibited the highest binding energy, indicating superior structural stability and interfacial compatibility, leading to reduced sensitivity.
  • The CL-20/3,5-MDNP/PEG formulation demonstrated enhanced initiation characteristics but showed weaker interfacial compatibility.
  • Theoretical evaluations predicted the influence of polymer binders on structural stability, trigger bond length, mechanical properties, and detonation performance.

Conclusions:

  • The CL-20/3,5-MDNP/EVA system is recommended for applications requiring high stability and strong binder compatibility.
  • The CL-20/3,5-MDNP/PEG system is suitable for applications demanding enhanced detonation performance.
  • Polymer selection significantly influences the properties and performance of CL-20/3,5-MDNP co-crystal-based PBXs.