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近年来由于耐热性高聚物的研究及分解产物对环境的影响,所以高聚物热分解机制的研究受到重视。热分析方法用于高聚物热分解动力学研究已有种种报导。其中以Ozawa方法为目前广泛采用。该方法在运用于n级反应,求取反应级数n时常可获得明确的结果,但是在运用于高分子无规断链时,由于各L值的(1-C)～lg Aθ曲线本身极为相似,所以在用曲线拟合时感到难于确定。作者为了寻找一个更准确判断L值的方法,导出直线方程式(1-C)e~(LAθ)=Le~(Aθ)-L+1,用它来处理实验结果,可以得到明确的结果。
In recent years due to heat-resistant polymer research and decomposition products on the environment, so the mechanism of polymer thermal decomposition of attention. Thermal analysis methods have been reported for the thermal decomposition kinetics of polymers. Which Ozawa method is widely used at present. This method can be applied to the n-stage reaction to obtain the reaction order n, but the definite result can be obtained. However, when used in the random chain scission of polymer, the (1-C) ~ lg Aθ curve of each L value is extremely Similar, so it is difficult to determine when using curve fitting. In order to find a more accurate method to determine the value of L, the equation (1-C) e ~ (LAθ) = Le ~ (Aθ) -L + 1 is derived and used to deal with the experimental results, we can get a clear result.