利用热重法(TG)和差示扫描量热法(DSC)研究了不同取代度的纤维素油酸酯(CO)在氢气中的热降解及热降解动力学.为确定CO的热降解动力学参数,首先采用Kissinger法计算反应级数n,再利用Coats-Redfem法计算活化能Ea和频率因子A,计算结果适用于起始降解温度(Td)到最大降解速率温度(Tp)附近的温度范围.计算结果表明,CO热降解反应级数n随取代度的增加由2.9(S1)下降为1.4(S3)；CO的Td和Tp均随取代度的增加而降低,说明CO的热稳定性随取代度的增加而降低；活化能Ea和频率因子A同样随取代度的增加而降低.
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