Process for Assessing the Stability of HAN (Hydroxylamine)-Based Liquid Propellants.
Interim rept. no. 2 for period ending 9 Jun 87,
FRAUNHOFER-INST FUER TREIB- UND EXPLOSIVSTOFFE PFINZTAL-BERGHAUSEN (GERMANY F R)
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The second Interim Report deals with the quantitative chemical analysis of monergol liquid propellants based on HAN. This included the components HAN hydroxylamine, IPAN Isopropylammonium nitrate, TEAN triethanolammonium nitrate, AN ammonium nitrate and free nitric acids. As method, volumetric analysis titration with potentiometric electrochemical indication was selected. For our measurements we used the Titroprozessor 636 a microprocessor system from Messrs. Metrohm AG CH 9100 Herisau, Switzerland. We used water as solvent for the samples i.e. no organic solvents. The propellant components were to be determined by immediate simultaneous titration in a sample. HAN and AN had to be converted to derivates acetoxim and hexamethylene tetramine as the case arose. Relative error was 0.1 - 0.2 for HAN and 1 - 1.5 for IPAN and TEAN. Nitric acid and AN were only present in small quantities approx. 1. The relative error may here reach 25. Titrations organic solvents were to be carried out and assessed later. Keywords Liquid propellants, Monergols, Chemical stability, Long term stability, Chemical analysis.
- Ammunition and Explosives
- Liquid Rocket Propellants
- Organic Chemistry