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C O N T R A C T O R G R A N T N .V M g f t s) .LI M. Guimont // TFBTTNPreliminary examination of the physical properties and sensitivity characteristics of FDNP and TFDNP indicates that these partially fluorinated nitrate esters are potentially useful propellant ingredients. When compared with 1,2-propanediol dinitrate (DNP), which is currently used in Otto Fuel II, FDNP has a lower vapor pressure, higher density, less sensitivity to initiation by impact, and a higher calculated detonation pressure and velocity. TFDNP also compares favorably with DNP, except that its vapor pressure is higher than DNP. A small sample of TFBTTN was prepared, but physical property measurements have not been made. Despite its structural similarity to nitroglycerin, TFBTTN was found to detonate only when subjected to a very strong hammer blow.The results of the research conducted under this contract demonstrated that fluorinated nitrate esters can be prepared readily using known synthetic routes to fluorinated alcohols and an efficient nitration system developed under an ONR contract. The fluorinated nitrate esters are more energetic and less sensitive to initiation by impact than the nonfluorinated analogs. They also have good physical properties and thermal stability, making them desirable energetic materials for use in liquid propellants or as plasticizers for solid propellants.

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