六(2,4,6-三溴苯氧基)环三磷腈(BPCPZ)的合成、热性能及应用

Synthesis,Thermal Property and Application of Hexakis (2,4,6-Tribromophenoxy) cyclotriphosphazene (BPCPZ)

以六氯环三磷腈与2,4,6-三溴苯酚反应,制得有机磷腈化合物六(2,4,6-溴苯氧基)环三磷腈(BPCPZ)。用红外、核磁、质谱及元素分析对产物结构进行了表征。研究了溶剂、原料配比、反应温度和反应时间对产物收率的影响。结果表明,合成的最佳条件是:四氢呋喃为溶剂,反应物料配比为n(三溴苯酚):n(六氯环三磷腈)=6.56:1,反应温度为65～68℃,反应时间24h,产品收率为98%。热性能和烧蚀性能研究表明,该化合物具有很好的耐热性与阻燃性,可以作为固体火箭推进剂绝热包覆层的有机填料。

Hexakis（2,4,6-tribromophenoxy）cyclotriphosphazene（BPCPZ） was prepared via the reaction of hexachlorocyclotriphosphzene and 2,4,6-tribromophenol.The structure of BPCPZ was characterized by FT-IR,MS,1HNMR,31PNMR,13C NMR spectroscopy and elemental analysis.The factors affecting the yield of BPCPZ,such as reagent,molar ratio of 2,4,6-tribromophenol/hexacholrocyclotriphosphazene,reaction temperature（T） and reaction time（t） were investigated.The optimized process conditions were：n（2,4,6-tribromophenol）/（hexacholrocyclotriphosphazene）=6.56,T=65℃,t=24 h,and tetrahydrofuran as solvent.The yield of BPCPZ was 98%.The compound has perfect heat-resistance and flame retardant resistance and can be used as organic filler in insulation layer for the solid rocket motor.