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以新戊二醇、三氯氧磷及1,3,5-三羟基苯等为原料,经过两步反应合成新型磷系阻燃剂1,3,5-三(5,5-二甲基-1,3-二氧杂-2-氧代己内磷酰基-2-氧)苯,采用元素分析、FT-IR、MS及1HNMR等技术确定了标题化合物的分子结构.以TG-DTG为手段,研究该新型磷系阻燃剂在氮气气氛中的热分解动力学;利用Kissinger法、Flynn-Wall-Ozawa(FWO)法对其进行热分解动力学研究,求出该阻燃剂的热分解动力学参数;利用Coast-Redfern法研究该阻燃剂的热分解机理.结果表明,Kissinger法所求得的表观活化能为171.72kJ·mol-1,指前因子lnA为37.57;Flynn-Wall-Ozawa法所求得的表观活化能为172.05kJ·mol-1.标题化合物的热分解动力学方程g(α)=α1/4,反应级数n=1/4.
Using neopentyl glycol, phosphorus oxychloride and 1,3,5-trihydroxybenzene as raw materials, a new type of phosphorus flame retardant 1,3,5-tris (5,5-dimethyl Dioxo-2-oxo-hexanophospho-2-oxo) benzene, the molecular structure of the title compound was confirmed by elemental analysis, FT-IR, MS and 1HNMR. Means to study the thermal decomposition kinetics of the new type of phosphorus-based flame retardant in a nitrogen atmosphere. The thermal decomposition kinetics of the novel phosphorus-based flame retardant was investigated by using Kissinger method and Flynn-Wall-Ozawa (FWO) method. The thermal decomposition mechanism of the flame retardant was studied by Coast-Redfern method.The results showed that the apparent activation energy obtained by Kissinger method was 171.72kJ · mol-1, the pre-factor lnA was 37.57, and the Flynn- The apparent activation energy calculated by the Wall-Ozawa method was 172.05 kJ · mol-1. The thermal decomposition kinetic equation g (α) of the title compound was α1 / 4, and the reaction order was n = 1/4.