Macrocycle as a "Container" for Dinitramide Salts

Area of Science:

• Energetic Materials Science
• Inorganic Chemistry
• Pyrotechnics

Background:

• Dinitramic acid salts are valuable oxidizers and burning-rate modifiers in high-energy compositions.
• Hygroscopicity limits the application and storage of many dinitramic acid salts.
• Developing stable dinitramic acid salts is crucial for their practical use.

Purpose of the Study:

• To synthesize a stable adduct of nickel dinitramide with carbohydrazide and glyoxal.
• To address the limitations of stability and storage associated with traditional dinitramic acid salts.
• To evaluate the potential of the synthesized adduct as a burning-rate inhibitor.

Main Methods:

• Synthesis of the nickel dinitramide-carbohydrazide-glyoxal adduct.
• Confirmation of chemical composition using infrared spectroscopy and elemental analysis.
• Determination of nickel content via atomic emission spectroscopy.
• Thermal analysis using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA).

Main Results:

• The adduct's chemical composition and nickel content were successfully confirmed.
• Thermogravimetric and DSC analyses revealed three distinct decomposition stages.
• The synthesized adduct demonstrated good thermal stability.
• The adduct exhibited low sensitivity to mechanical stimuli.
• The adduct proved to be a promising burning-rate inhibitor for pyrotechnic compositions.

Conclusions:

• A stable adduct of nickel dinitramide with carbohydrazide and glyoxal was successfully synthesized.
• The adduct exhibits favorable thermal stability and low sensitivity, making it suitable for practical applications.
• This novel adduct represents a significant advancement in the development of stable energetic materials.
• The findings indicate the adduct's potential as an effective burning-rate inhibitor in pyrotechnic formulations.