Hypergolic chemicals
N,
N,
N-trimethylhydrazinium iodide, [TMH]
+[I]
−, and 1-ethyl-4-methyl-1,2,4-triazolium iodide, [EMT]
+[I]
− were firstly synthesized by nucleophilic substitution (S
N2). The successful synthesis of hypergolic chemicals [TMH]
+[I]
− and [EMT]
+
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Hypergolic chemicals
N,
N,
N-trimethylhydrazinium iodide, [TMH]
+[I]
−, and 1-ethyl-4-methyl-1,2,4-triazolium iodide, [EMT]
+[I]
− were firstly synthesized by nucleophilic substitution (S
N2). The successful synthesis of hypergolic chemicals [TMH]
+[I]
− and [EMT]
+[I]
− was confirmed by IR and
1H-NMR spectroscopy and, GC-mass spectrometry. Subsequently the hypergolic chemicals [TMH]
+[X]
− (X = CN
−, N
3−, NO
3−, NO
2−, ClO
4−, AlCl
4−) were prepared via an ion exchange reaction from [TMH]
+[I]
− and [EMT]
+[I]
−, respectively. After that, a mixture of hypergolic chemicals was prepared by dissolving the synthesized hypergolic chemicals in 2-hydroxyethylhydrazine (HOCH
2CH
2NHNH
2). The physical and chemical properties of the mixture such as decomposition temperature (T
d), density (d), viscosity (η), and decomposition energy (ΔH
d) was then evaluated to determine suitability for use as liquid rocket fuels. The ignition delay (ID) time of the mixture of hypergolic chemicals with [TMH]
+[N
3]
− and [TMH]
+[CN]
− using H
2O
2 as an oxidizer was determined as 55.6 ms and 97.4 ms; respectively. The ID time of the mixture of hypergolic chemicals with [EMT]
+[N
3]
−; [EMT]
+[CN]
−; [EMT]
+[AlCl
4]
−; and [EMT]
+[I]
− using H
2O
2 as an oxidizer was also determined as 18.0 ms; 32.6 ms; 27.6 ms; and 7.96 ms; respectively. The synthesized mixture of hypergolic chemicals could thus be used as a rocket propellant liquid fuel.
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