Research on TNTON/DNTF eutectic characteristics: an exploration of low eutectic mixture based melt-cast explosive...

Area of Science:

• Energetic Materials Science
• Chemical Engineering
• Materials Science

Background:

• DNTF (1,1-diamino-2,2-bis(nitramino)-4,4,5,5-tetranitrobicyclohexa-1,5-diene) is a high-energy explosive.
• Modifying the sensitivity and melting point of DNTF is crucial for its safe handling and application.
• Eutectic systems offer a promising approach to tune explosive properties.

Purpose of the Study:

• To prepare a novel eutectic system of 3,5,5-trinitro-1,3-oxazinane (TNTON) and DNTF.
• To investigate the melting behavior, thermal stability, and sensitivity of the TNTON/DNTF eutectic.
• To evaluate the detonation performance of the new eutectic explosive composition.

Main Methods:

• Preparation of TNTON/DNTF eutectic mixtures at various ratios.
• Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) for thermal behavior.
• Impact and friction sensitivity tests.
• Calculation of detonation performance using EXPLO-5 software.

Main Results:

• The stoichiometric composition of the TNTON/DNTF eutectic was determined as 58.26:41.74 with a melting point of 69 °C.
• The eutectic exhibited delayed melting and decomposition with increasing heating rates, indicating good thermal stability.
• Impact sensitivity (38 J) and friction sensitivity (252 N) were significantly reduced compared to DNTF alone.
• Calculated detonation velocity reached 8921 m s⁻¹ with a theoretical density of 1.906 g cm⁻³.

Conclusions:

• The TNTON/DNTF eutectic system effectively reduces the sensitivity of DNTF while maintaining high energy output.
• This eutectic composition demonstrates superior detonation performance compared to TNT-based explosives.
• The developed eutectic explosive shows promise for applications requiring a balance of high energy and improved safety characteristics.