N. J. Curtis
Oct 1, 1990
Citations
0
Influential Citations
19
Citations
Journal
Propellants, Explosives, Pyrotechnics
Abstract
The derivatisation of diphenylamine (DPA) in single base gun propellants was studied as a function of aging at 80°C. The relative proportions of 2-nitro DPA and 4-nitro DPA varied from 32 : 68 to 63 : 37 according to propellant type. Preferences for para substitution were seen in experimental lots “stabilized” with 2-nitroDPA, 4-nitroDPA and N-nitrosoDPA. Increasing water content resulted in higher preferences for ortho substitution. 4-NitroDPA is a better stabilizer than 2-nitroDPA. Model studies performed using nitro substituted N-nitrosamines show that para substitution is preferred in boiling acetic acid. Mechanisms for the conversion of N-nitrosamines into isomeric nitro derivatives are discussed with relation to the model studies and the behaviour in propellants. Detailed experimental procedures are given for the preparation of N-nitrosamines.