Oxetane Monomers Based On the Powerful Explosive LLM-116: Improved Performance, Insensitivity, and Thermostability

Area of Science:

• Energetic Materials Science
• Organic Synthesis
• Crystallography

Background:

• 3-Bromomethyl-3-hydroxymethyloxetane is a versatile precursor for oxetane derivatives.
• Energetic oxetanes are crucial for advanced applications requiring high performance and safety.

Purpose of the Study:

• To improve the synthesis of 3-Bromomethyl-3-hydroxymethyloxetane.
• To synthesize novel energetic oxetanes based on LLM-116.
• To evaluate the performance, stability, and sensitivity of these new compounds.

Main Methods:

• Improved synthesis of oxetane precursor.
• Preparation of symmetric and asymmetric LLM-116-based oxetanes.
• Characterization using spectroscopy (NMR, MS, vibrational), DSC, elemental analysis, and X-ray diffraction.
• Sensitivity testing (Hirshfeld analysis, BAM procedures, shock/initiation tests).
• Performance calculations using EXPLO5 V6.04 code.

Main Results:

• Synthesized novel energetic oxetanes with high detonation velocities (up to 7335 m/s) and pressures (up to 20.9 GPa).
• Achieved excellent thermostability and insensitivity compared to existing materials.
• Characterized symmetric and asymmetric derivatives with various functional groups (azido, nitrato, tetrazolyl).
• Demonstrated low sensitivity through multiple testing methods.

Conclusions:

• The developed energetic oxetanes offer superior performance and safety profiles.
• The improved synthesis route and novel structures pave the way for next-generation energetic materials.
• These compounds represent a significant advancement in the field of energetic materials.