六苯氧基环三磷腈(HPCTP)是一种环境友好型阻燃剂,因具有良好的耐热性和阻燃性而备受关注.以六氯环三磷腈(HCCP)、苯酚和氢氧化钠为原料制备 HPCTP,经红外光谱(IR)、X 射线衍射分析(XRD)、核磁共振(NMR)、元素分析(EA)、质谱分析(MS)、差热(DSC)和热重(TG)等分析手段对产物的结构和热稳定性进行了表征,并考察了反应温度、反应时间和投料比例3个因素对 HPCTP 收率的影响.结果表明,以 THF 为溶剂, n(苯酚)∶n(NaOH)＝1∶1,n(苯酚)∶n(HCCP)＝8∶1,65℃回流反应48 h,HPCTP 的收率为92．0％.热稳定性研究表明,HPCTP的热稳定性较好,在N2气氛下的起始分解温度为365℃,适合作为阻燃剂添加到聚合物基材中,而且可以将其应用到对加工温度要求比较高的体系中去.
Hexa (phenoxy)cyclotriphosphazene(HPCTP)was an environmentally friendly flame retardant and it has attracted significant attention because of its excellent heat-resistance and flame-resistance.In the study, HPCTP was synthesized by the reaction of hexachlorocyclotriphosphazene (HCCP)with phenol and sodium hy-droxide,and characterized by means of infrared spectrometer (IR),X-Ray diffraction (XRD),nuclear magnetic resonance (NMR),elemental analysis(EA),mass spectrometry(MS),differential scanning calorimetry(DSC) and thermogravimetry(TG).The influences of reaction temperature(T),reaction time(t)and raw material ra-tio on the yield of HPCTP were investigated.The results showed when n(phenol)∶n(sodium hydroxide)=1∶1,n(phenol)∶n(HCCP)=8∶1,T=65 ℃,t=48 h,THF as solvent,the yield of HPCTP was the highest and amounted up to 92.0%.Thermal analysis results showed that the onset decomposition temperature of HPCTP was 365 ℃.Therefore,HPCTP was a flame retardant with perfect thermal stability,and it can be applied in high processing temperature system.
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