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)苯的合成及热分解动力学研究

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1H NMR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171.72 kJ•mol－1, 指前因子ln A为37.57; Flynn-Wall-Ozawa法所求得的表观活化能为172.05 kJ•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.

Synthesis and Thermal Decomposition Kinetics of Novel Flame Retardant 1,3,5-Tris(5,5-dimethyl-1,3-dioxa-2- oxophosphorinanyl-2-oxy)benzene

The novel flame retardant 1,3,5-tris(5,5-dimethyl-1,3-dioxa-2-oxophosphorinanyl-2-oxy)-ben-zene was synthesized via neopentyl alcohol,phosphous oxychloride and 1,3,5-trihydroxybenzene by a two step reaction,and its structure was identified and studied by elemental analysis,IR,1H NMR and MS techniques.The thermal decomposition kinetics of the novel flame retardant were studied by TG-DTG techniques.The kinetic parameters,including the activation energy and frequency factor of the decomposition process for the...