Burning rate inhibitors of HTPB/AP/Al propellants was written by Ran, Xiulun;Yang, Rongjie. And the article was included in Huozhayao Xuebao in 2006.COA of Formula: C28H38O19 This article mentions the following:
The effect of ammonium oxalate, lithium fluoride, calcium carbonate, strontium carbonate, quaternary ammonium salt and etc. as burning rate inhibitors on burning rate of HTPB/AP/Al propellant were investigated. Considerable decrease in burning rate was observed when quaternary ammonium salt composite with carbonate or lithium fluoride were used as depressant, and above-mentioned composite inhibitors had excellent effect on decreasing the burning rate of propellants. In HTPB/AP/Al propellants, the quaternary ammonium salts composite with carbonates were more pronounced on decreasing burn rate than ammonium oxalate inhibitor which was now used for many practical low burning rate propellant. The firing tests of BSFΦ75mm motors indicated that quaternary ammonium salt composite with carbonate also could decrease the pressure exponent of the propellant from 0.33 to 0.20 in the pressure range of 3.45-12.17MPa. The firing test of BSΦ165mm motors loaded with HTPB/AP/Al propellant grain containing quaternary ammonium salt and carbonate as inhibitor gave more stable chamber pressure-time and thrust-time histories than that containing ammonium oxalate, and the results showed that the d.-specific impulse of obtained formulation was 2.8% higher than that containing ammonium oxalate with the same burning rate. In the experiment, the researchers used many compounds, for example, (2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate (cas: 126-14-7COA of Formula: C28H38O19).
(2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate (cas: 126-14-7) belongs to tetrahydrofuran derivatives. Tetrahydrofuran (THF) is a Lewis base that bonds to a variety of Lewis acids such as I2, phenols, triethylaluminum and bis(hexafluoroacetylacetonato)copper(II). Oxidations have also proved to be valuable and efficient approaches to chiral tetrahydrofuran derivatives.COA of Formula: C28H38O19
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem