Print Email Facebook Twitter HNF/HTPB propellants: Influence of HNF particle size on ballistic properties Title HNF/HTPB propellants: Influence of HNF particle size on ballistic properties Author van der Heijden, A.E.D.M. Leeuwenburgh, A.B. TNO Defensie en Veiligheid Publication year 2009 Abstract The burning rate characteristics of solid composite propellants can be modified via different methods. One of these is the application of different oxidizer particle sizes in the propellant. The effect of the use of fine and coarse particles of the oxidizer hydrazinium nitroformate (HNF) in hydroxyl-terminated polybutadiene (HTPB)-based propellants is reported in this paper. The fine HNF particles were obtained by means of a grinding process. The fine and coarse HNF grades were characterized regarding their hazardous and thermal stability properties, as well as the influence of a cured and uncured HTPB binder on these characteristics. The ballistic properties of three (two monomodal and one bimodal) HNF/HTPB-based propellants show that the use of fine HNF (5–10 μm mean size) leads to a lowering of the pressure exponent of the propellant, implying that the propellant burning rate can be tuned by varying the mean size of the HNF grades present in the propellant. © 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved. Subject BallisticsBallistic propertiesOxidizer sizePropellantsBallistic propertiesBurning rateCoarse particlesGrinding processHydrazinium nitroformateHydroxyl-terminated polybutadieneMean sizeOxidizer sizePressure exponentsPropellant burning rateSolid compositesThermal stabilityBallisticsButadieneExplosivesParticle sizePropellantsStabilitySpacecraft propulsion1,3 butadiene derivativehydrazine derivativearticlecombustioncontrolled studygrindingparticle sizepriority journalthermostability To reference this document use: http://resolver.tudelft.nl/uuid:af85c4d6-f851-4d47-8635-bd56c14dd888 DOI https://doi.org/10.1016/j.combustflame.2009.03.007 TNO identifier 90031 Source Combustion and Flame, 156 (7), 1359-1364 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.