CAJ | 학술논문

通过热重分析仪对油酸甲酯和硬脂酸甲酯的热解特性进行了研究，发现油酸甲酯相变硬脂酸甲酯具有较差的热安定性。在升温速率分别为10、15、20、30℃/min 条件下，利用 TG-DTG 曲线分析了它们的基本热解特性。结果表明，随着升温速率的增加，它们的起始热分解温度、最大失重速率、最大失重速率峰值温度以及其他热分解参数均呈增大趋势。同时，用多元线性回归法求得相应的反应级数、活化能和指前因子，发现油酸甲酯和硬脂酸甲酯的热解反应机理函数不同，且反应活化能和指前因子之间表现出较好的动力学补偿效应。
통과열중분석의대유산갑지화경지산갑지적열해특성진행료연구，발현유산갑지상변경지산갑지구유교차적열안정성。재승온속솔분별위10、15、20、30℃/min 조건하，이용 TG-DTG 곡선분석료타문적기본열해특성。결과표명，수착승온속솔적증가，타문적기시열분해온도、최대실중속솔、최대실중속솔봉치온도이급기타열분해삼수균정증대추세。동시，용다원선성회귀법구득상응적반응급수、활화능화지전인자，발현유산갑지화경지산갑지적열해반응궤리함수불동，차반응활화능화지전인자지간표현출교호적동역학보상효응。
The differences in pyrolysis process of methyl stearate and methyl oleate were investigated under nitrogen atmosphere in a thermogravimetric analyzer at heating rate of 10 ℃/min from room temperature to 600 ℃. The results show that the methyl oleate has relatively lower stability of thermal decomposition compared with methyl stearate. At the same time, the pyrolysis and kinetic characteristics of methyl oleate and methyl stearate were further studied at heating rates of 10, 15, 20 and 30 ℃/min, respectively. The results indicate that the initial decomposition temperature, peak temperature of DTG curve, the maximum weight loss rate and other pyrolysis parameters all increase. In addition, the corresponding activation energy, pre-exponential factor and reaction order were calculated by Multiple-Linear Regression method. It’s found that the pyrolysis reaction mechanism functions of two kinds of fatty acid methyl ester are different,and the pyrolysis activation energy and pre-exponential factor present a good kinetic compensation effect.