摘要
首先用同步热分析仪(STA)测定了一定温度区间内2,4-二硝基酚钠的比热容,利用Origin8.0软件回归比热容随温度变化的方程式,拟合系数为0.913 6,标准偏差为0.005 9。然后分别在空气和氮气气氛下对2,4-二硝基酚钠进行了TG/DSC测试,并与单硝基酚钠(邻、间、对位)的热分解性能进行了比较。通过在氮气气氛不同升温速率下的测试,用Kissinger法得到2,4-二硝基酚钠热分解反应的表观活化能、指前因子等动力学参数。研究表明:2,4-二硝基酚钠在300℃以下具有良好的热稳定性,Kissinger法得到的2,4-二硝基酚钠表观活化能为244.8 kJ/mol,指前因子为2.5×10^(18)s^(-1)。
The use of simultaneous thermal analyzer （STA） was determined by a certain temperature range 2,4 - dinitrophenol sodium heat capacity, the use of Origin8.0 software return temperature specific heal equation with the fitting coefficient of 0.913 6, standard deviation of 0.005 9. Then were in the air and nitrogen atmosphere of 2,4 - dinitrophenol sodium were TG / DSC test, and single-nitrophenol sodium （o, m, of the bit） the thermal decomposition properties were compared. By different heating rates in nitrogen atmosphere under test, with the Kissinger method to be 2,4 - dinitrophenol sodium thermal decomposition of the apparent activation energy, preexponential factor and other kinetic parameters. Studies have shown that： 2,4 - dinitrophenol sodium below 300 ℃ with good thermal stability, Kissinger method to be 2,4 - dinitrophenol sodium apparent activation energy of 244.8 kJ / mol, preexponential factor 2.5 ×10^18s^-1.
出处
《安全、健康和环境》
2011年第9期44-48,共5页
Safety Health & Environment
关键词
2
4-二硝基酚钠
热分解
差示扫描量热法(DSC)
非等温动力学
2,4 - dinitrophenol sodium
thermal decomposition
differential scanning calorimetry （DSC）
non-isothermal kinetics
