4.3 Article

Synthesis and Characterization of Tetramethylethylenediamine-Based Hypergolic Ionic Liquids

Journal

JOURNAL OF ENERGETIC MATERIALS
Volume 34, Issue 2, Pages 138-151

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/07370652.2015.1017669

Keywords

dicyanamide; heat of formation; hypergolic; specific impulse; tetramethylethylenediamine

Funding

  1. National Natural Science Foundation of China [21376252, 21406242]
  2. National Defense Science and Technology Innovation Fund of Chinese Academy of Sciences [CXJJ-14-M37, CXJJ-14-M41]

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Four energetic salts (including two ionic liquids) based on 2-(dimethylamino)-N,N,N-trimethylethanaminium and N,N-dialkyl-N,N,N,N-tetramethylethane-1,2-diaminium was prepared and characterized by H-1- and C-13-NMR, infrared and Raman spectroscopies, and elemental analysis. Their physicochemical properties such as melting and decomposition temperatures, density, viscosity, heat of formation, detonation performance, and specific impulse were measured or calculated. With thermal stability up to 200 degrees C, the resulting ionic liquids show densities from 1.02 to 1.19 g cm(-3) and heats of formation from 85.1 to 154.4 kJ mol(-1). Moreover, 2-(dimethylamino)-N,N,N-trimethylethanaminium dicyanamide is hypergolic with the oxidizer (100% HNO3) and exhibits potential as a green fuel for bipropellants.

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