摘要
以TG/DTG/DTA为手段,研究了N,N′-二苯基顺丁二甲酰胺β成核剂在空气气氛中的热分解动力学,利用Kissinger法、Flynn-Wall-Ozawa(FWO)法对N,N′-二苯基顺丁二甲酰胺β成核剂进行了动力学分析,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.用等温TG法得到失重10%的寿命方程.结果表明,Kissinger法所求的活化能为113.01kJ·mol-1,指前因子lgA=9.83;Flynn-Wall-Ozawa法所求得的活化能为112.46kJ·mol-1.N,N′-二苯基顺丁二甲酰胺β成核剂的热分解机理为相边界反应,圆柱形对称,反应级数n=1/2,其动力学方程为G(α)=1-(1-α)1/2.寿命方程为:lnτ=-36.646+1.9117×104/T.
The thermal decomposition kinetics of N, N′-diphenyl maleic amide β-nucleating agent in air were studied using TG/DTG techniques. The kinetic parmeters, 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 N, N′-diphenyl maleic amide β-nucleating agent was also studied with the Satava-Sestak method. The lifetime equation at weigh loss of 10% was deduced by isothermal thermogravimetric analysis. The result shows that the activation energy and the pre-exponential factor are 113.01 kJ ·mol^-1 ： and lgA =9. 83 with the Kissinger method and the 112.46 kJ · mol^-1 with Flynn-Wall-Ozawa method respectively. The thermal decomposition mechanism of N, N′-diphenyl maleic amide β-nucleating agent is phase boundary reaction, cylindrical symmetry, and the kinetic equation can be expressed as G（α）= 1-（1- α）^1/2, the 1 reaction order is n=1/2. The lifetime equation is In τ= -36.646＋1.9117× 10^4/T.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2009年第2期148-152,共5页
Journal of Henan University:Natural Science
基金
河南省教育厅自然科学研究指导计划项目(2008B150005)
河南大学自然科学基础研究项目(06YBZR049)
关键词
N
N′-二苯基顺丁二甲酰胺
Β成核剂
热分解动力学
机理
N, N′-diphenyl maleic amide β-nucleating agent
Thermal decomposition kinetics
Mechanism
Lifetime
