作　　者： ; ; ;

机构地区： 青岛科技大学高分子科学与工程学院

出　　处： 《青岛科技大学学报（自然科学版）》 2003年第6期511-515,544,共6页

摘　　要： 通过Freeman Carroll和Liu Fan热解动力学方程分别计算了加热速率在 1 0K·min- 1 和 75K·min- 1 下 ,N2 环境中 5种聚合物的表观活化能、反应级数和指前因子。结果表明 ,3个动力学参数值随着加热速率的升高 ,对不同的聚合物呈现不同的变化规律。指前因子与活化能 ,PMMA、PET、HIPS呈升高趋势 ,而POM、PA66为降低趋势。反应级数的变化规律 ,PMMA和PA66随加热速率升高而降低 ,而POM、PET和HIPS则升高 ,但除PA66外反应级数随加热速率的变化差异不大。两种动力学计算方法得到的表观反应级数值没有很大的差异。 Using Freeman-Carroll and Liu-Fan pyrolysis kinetic equations, more reasonable apparent kinetic parameters of typical polymers at heating rates of 10 K·min -1 and 75 K·min -1 in nitrogen atmosphere have been evaluated respectively. The apparent kinetic parameter values for these polymers were varied as heating rates increased. Pre-exponential factor values and activation energy values were increased for PMMA, PET and HIPS as heating rates increased, while POM and PA66 decreased. In contrast to apparent activation energy and apparent pre-exponential factor, apparent reaction orders were reduced for PMMA and PA66, but increased for POM, PET and HIPS. On the whole, had no significant influence on the heating rate for the polymers except for PA66. In addition, there was no distinct difference between the apparent reaction order values evaluated by LF method and FC method.

关 键 词： 聚合物 热解动力学 加热速率 表观活化能 反应级数 指前因子

领　　域： [化学工程]