六(4–醛基苯氧基)环三磷腈的合成、表征及其热性能研究

Researches on Synthesis,Characterization and Thermal Property of Hexakis(4-Formacylphenoxy) Cyclotriphosphazene

通过六氯环三磷腈和4–羟基苯甲醛的亲核取代反应,成功合成出目标化合物六(4–醛基苯氧基)环三磷腈(HAPCP)。并考察了溶剂和缚酸剂类型、缚酸剂粒度、原料配比及反应时间对产物收率的影响。利用红外光谱和核磁共振对目标化合物的结构进行了表征,同时用热失重分析研究了目标化合物的热稳定性。结果表明:目标化合物在400℃左右有明显的热失重现象,在600℃时残碳率为84%,800℃时残碳率仍有78%,说明其具有优异的耐热性,可作为固体火箭推进剂绝热包覆层有机填料使用。

The target compound hexakis（4-formacylphenoxy）cyclotriphosphazene（HAPCP） was successfully synthesized by nucleophilic substitution reaction of hexachlorotriphosphazene and 4-hydroxybenzyl aldehyde. The influence of the solvent and deacid reagent type, deacid reagent particle size, raw material ratio and reaction time on the yield of the product was investigated. The structure of the target compound was characterized by using FT-IR spectrum and NMR, and its thermal stability was studied by using thermal gravimetric analysis. The results show that the target compound has obvious weight loss at about 400 ℃, and the residual carbon rate is 84% at 600℃ and 78% at 800℃. It proves that the target compound has good thermal stability and can be used as organic filler in insulation inhibitor of solid rocket propellants.