Accession Number : AD0374403

Title :   HIGH ENERGY PROPELLANT INGREDIENT RESEARCH AND DEVELOPMENT.

Descriptive Note : Quarterly technical rept. no. 2, 1 Apr-30 Jun 66,

Corporate Author : DOW CHEMICAL CO MIDLAND MICH SCIENTIFIC PROJECTS LAB

Personal Author(s) : Matzek,Norman E.

Report Date : 15 JUL 1966

Pagination or Media Count : 79

Abstract : Studies on the preparation and properties of AlH3-1451 possessing improved thermal stability have continued. Incorporation of magnesium into the AlH3-1451 lattice in concentrations greater than 1% via the continuous process has been accomplished. Teflon FEP shows excellent promise as a material of construction for the continuous crystallizer. Flame photometry has been successfully applied to determine the stoichiometric equivalence point for the reaction between aluminum chloride and lithium aluminum hydride. The controlling parameters for the direct nucleation of AlH3-1451 have been studied and a working phase diagram determined. The effect of impurities on the decomposition of aluminum hydride during preparation is presented. The mechanism of diphenylacetylene (DPA) stabilization of AlH3-1451 is discussed. Data indicate that the in situ treatment of the hydride with DPA is necessary to obtain a four-fold improvement in stability Aging of magnesium-doped AlH3-1451 has resulted in an approximate seven-fold improvement in hydride stability. The increased stability due to aging is found to increase as the magnesium concentration increases. Normal macrocrystalline samples of AlH3-1451 stored for 1.8 to 2.3 years have decomposed less than 1% at ambient temperature, with no detectable decomposition at -15 C. The decomposition rate of normal AlH3-1451 in double base propellant at 25 C and 40 C. is continuing to slowly decrease, reaching 0.27% decomposition in 306 days at 25 C. and 0.53% in 280 days at 40 C.

Descriptors :   (*ROCKET PROPELLANTS, SCIENTIFIC RESEARCH), AGING(MATERIALS), STORAGE, DECOMPOSITION (U) (*ALUMINUM COMPOUNDS), (*HYDRIDES), THERMAL STABILITY, ADDITIVES, MAGNESIUM, HALOGENATED HYDROCARBONS, FLUORINE COMPOUNDS, ALKYNES, BIPHENYL, DOPING, NITROGEN COMPOUNDS, OXIDES, CRYSTALLIZATION, COMPOSITE PROPELLANTS

Subject Categories : Rocket Propellants
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE