N,N'-二(5,5-二甲基-2-磷杂-2-硫代-1,3-二噁烷-2-基)乙二胺的热分解动力学研究  

Study on Thermal Decomposition Kinetics of N,N'-Bis(5,5-dimethyl-2-phospha-2-thio-1,3-dioxan-2-yl) ethylene diamine

作　　者：任元林[1] 程博闻[1] 张金树[1] 

机构地区：[1]天津工业大学天津市纤维改性及功能纤维重点实验室,天津300160

出　　处：《化学学报》2007年第17期1892-1896,共5页Acta Chimica Sinica

基　　金：中石化科技资金(No.205026);天津市科技发展计划(No.06TXTJJC14400)资助项目.

摘　　要：以TG-DTG为手段,研究了N,N'-二(5,5-二甲基-2-磷杂-2-硫代-1,3-二噁烷-2-基)乙二胺(DPTDEDA)在氮气气氛中的热分解动力学,利用Kissinger法、Flynn-Wall-Ozawa(FWO)法对DPTDEDA进行了动力学分析,求出了该物质的热分解动力学参数,同时利用Satava-Sestak法研究了该物质的热分解机理.结果表明,Kissinger法所求得的表观活化能为137.37kJ·mol-1,指前因子lnA=28.00;Flynn-Wall-Ozawa法所求得的活化能为139.83kJ·mol-1.DPTDEDA的热分解机理为相边界反应,其动力学方程为G(α)=1-(1-α)4,反应级数n=4.The thermal decomposition kinetics of the N,N＇-bis（5,5-dimethyl-2-phospha-2-thio-1,3-di- oxan-2-yl） ethylene diamine （DPTDEDA） in N2 were studied by TG-DTG techniques. The kinetic parameters, including the activation energy and frequency factor of the decomposition process for the title compound were calculated through the Kissinger and Flynn-Wall-Ozawa（FWO） method and the thermal decomposition mechanism of DPTDEDA was also studied with the Satava-Sestak method. The results show that the activation energy and pre-exponential factor are 137.37 kJ·mol^-1 and 1.45 ×1012 s^-1 with the Kissinger method and 139.83 kJ·mol^-l with the Flynn-Wall-Ozawa method respectively. The thermal decomposition mechanism of DPTDEDA is phase boundary reaction and the kinetic equation can be expressed as G（a）= 1-（1-α）^4, and the reaction order is n=4.

关 键 词：N N'-二(5 5-二甲基-2-磷杂-2-硫代-1 3-二噁烷-2-基)乙二胺 热分解动力学 活化能 机理 

分 类 号：O643.1[理学—物理化学]