Discovery of a Low Temperature Form of TAGN (Triaminoguanidinium Nitrate)
Abstract
Triaminoguanidinium nitrate (TAGN) has been frequently added to cyclic nitramine (RDX) propellant formulations in an effort to increase the burning rates of these propellants. This is particularly important in LOVA propellants formulated for high performance artillery or tank gun applications where faster burning rates are necessary. Although this property of TAGN was known for quite some time, no satisfactory explanation for this phenomenon presently exists. In an effort to understand this compound and its properties more completely, a room temperature single crystal x-ray diffraction study was initiated. A low temperature polymorph of triaminoguanidinium nitrate (TAGN) was discovered during the course of a rigid-body motion study of the nitrate ion. Differential scanning calorimetry (DSC) measurements made a several different heating rates over a temperature range of -100 degrees C to room temperature yielded a small reversible endotherm with a reproducible onset temperature and reproducible heat capacity values. X-ray diffraction measurements also were carried out over a similar temperature range to determine the relationships among reflection intensity, lattice parameters (unit-cell volume), and temperature. Details of the experimental procedures, results, and implications are presented. Keywords: crystal structure, Molecular structure, Heat capacity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1988
- Accession Number
- ADA196059
Entities
People
- A. J. Bracuti
- J. K. Salo
Organizations
- United States Army Armament Research, Development and Engineering Center