INVESTIGATION OF THE THERMODYNAMIC PROPERTIES OF PROPELLANT INGREDIENTS
Abstract
Heat of combustion measurements on perfluoroammonium fluoborate gave erratic results. The amount of sample available is limited and not sufficient to allow tracing down the reasons for the failure of this technique. A differential scanning calorimeter requiring only a few milligrams of sample was successfully used to measure the heat of decomposition and this approach yielded a preliminary heat of formation of -319 + or - 10 kcal/mole. Further work on the heat of decomposition is planned to improve the accuracy and to better establish the products of decomposition. The heat of formation of a sample of aminoethylaziridine (Code ELF-100), C4H10N2 was derived as +12.68 kcal/mole from heat of combustion measurements. Work on methyldiazabicyclo-octane (Code ELF- 101), C7H14N2 revealed the heat of combustion to be decreasing with time, indicating some slow chemical change taking place. No accurate heat of formation could be obtained. The heat of combustion of aniline hydrochloride was measured and a new computerized data reduction program used to derive a heat of formation of -43.0 kcal/mole. This is in reasonable agreement with -42.0 kcal/mole from heat of solution data and it is concluded that no serious systematic errors remain in the data reduction program.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0391922
Entities
People
- D. R. Stull
- G. C. Sinke