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Generation of Melamine Polymer Condensates upon Hypergolic Ignition of Dicyanamide Ionic Liquids


  • This work has been supported by the Air Force Office of Scientific Research (AFOSR: FA 9550-10-1-0235) and the Center for Molecular Analysis and Design at Stanford University (CMAD: 1123893-1-AABGE). K.C. acknowledges financial help from the Swiss National Science Foundation (PBEZP2-133126). We thank Prof. Wolfgang Schnick (LMU Munich) and Dr. Joseph Mabry (AFRL, Edwards Air Force Base) for helpful discussions on nitride chemistry. We also thank Dr. Pavel Aronov and Dr. Allis Chien (Stanford University Mass Spectrometry) for providing instrumentation and their expertise in the field of mass spectrometry. Dr. Jun Ge (Stanford University) is acknowledged for his help with SEM measurements.


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The reaction of dicyanamide ionic liquids with nitric acid results in hypergolic ignition and the formation of a stable precipitate. The precipitate consists of cyclic triazines, including melamine and its polymers, such as melam and melem (see scheme). This study introduces a novel approach to the synthesis of cyclic azines without resorting to high temperatures and pressures.