【作者】 臧娜； 钱新明；

【Author】 ZANG Na~(1,2),QIAN Xin-ming~1 (1.State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China; 2.Department of Fire Protection Engineering,Chinese People’s Armed Police Force Academy,Langfang 065000,China)

【机构】 北京理工大学爆炸科学与技术国家重点实验室； 中国人民武装警察部队学院消防工程系；

【摘要】 用热分析（TG/DTA/DSC）技术研究过氧化月桂酰（Lauroyl peroxide,LPO）在氮气中以不同速率β升温时的热分解过程,热分析结果表明,LPO在氮气中的热分解过程分两步进行。采用DSC实验数据计算得出LPO的熔点、摩尔熔化焓、摩尔熔化熵分别为331.95K,15.58kJ·mol^-1,46.93J·mol^-1·K^-1。分别采用非等温Kissinger法、Flynn-WallOzawa法和Satava-Sestak法进行热分解动力学研究,得出LPO在氮气中热分解反应机理为收缩球状模型R₃,表观活化能为102.45 kJ·mol^-1,指前因子为3.81×10¹³S^-1。更多还原

【Abstract】 The thermal decomposition kinetics of layroyl peroxide in nitrogen condition was investigated by TG/DTA/DSC techniques with various heating rates of 2,4,6,8℃·min^-1.TG/DTA curves showed that decomposition proceeded through two steps. The melting point,molar enthalpy and entropy of fusion of LPO were determined by using differential scanning calonmetry（DSC） as 331.95K,15.58kJ·mol^-1,46.93J·mol^-1K^-1.The non-isothermal kinetics parameters were analyzed by means of the Kissinger and Flynn-Wall-Ozawa methods,and the thermal decomposition mechanism of LPO was also studied with the Satava-Sestak method. The results showed that the thermal decomposition mechanism of LPO in nitrogen condition was controlled by interface reaction R₃, and the apparent activation energy and pre-exponential factor were 102.45 kJ·mol^-1 and 3.81×10¹³ s^-1,respectively.更多还原