INVESTIGATION OF THE THERMODYNAMIC PROPERTIES OF PROPELLANT INGREDIENTS AND THE BURNING MECHANISMS OF PROPELLANTS
Abstract
The heat of formation of crystalline lithium-doped BeH2, TVOPA, DAHTP, CF4, CF3ONF2(g), Florox(g), and N2F4(g) were determined as -5.0, -208.1 + or - 2.9, -210.4, -223.23 + or - 0.60, -189.1 + or - 0.8, -33.2 + or - 0.5, -4.7 + or - 0.6 kcal/mol, respectively, and alane-terminated BeH2 analyzed as Al9Be11(CH3)29H20, as -35.7 + or - 2.1 kcal/100 g. Removal of solvent from TVOPA and preparation and purification of CF3ONF2 have both been completed. A photochemical process and a low temperature fluorination procedure have been used to prepare CF3NF2. The latter was the better method. Using the technique of flash pyrolysis, the combustion behavior of B-O, B-O2-H2O and B-O-fluorinated monomer system have been analyzed from the time of initiation to 3000 microsec. The presence of H2O in the combustion system increases the formation of the intermediate HOBO and results in a lowered flame temperature. The addition of fluorine to the system precludes the formation of H2O and likely that of HOBO, resulting in a higher flame temperature. The combustion of B in the presence of AP takes place in an atmosphere of gaseous products resulting from the deflagration of the AP. Only small amounts of water are present in this system. The present work suggests that in order to minimize the formation of HOBO, via: H2O + BO2 yields HOBO + OH, the hydrocarbon binder should be changed to a fluorocarbon binder. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1968
- Accession Number
- AD0387396
Entities
People
- A. C. Swanson
- G. C. Sinke
- L. C. Walker
- R. V. Petrella
- R. W. Anderson