中文摘要：

用TG-DTG方法研究了丹参的有效成分丹酚酸B的热降解过程.热重分析结果表明该物质的失重过程分两步进行.笫一步为脱去吸附水,其温度范围为305～373 K,第二步为丹酚酸B分子骨架大规模降解,其温度范围在413～864 K.用Friedman和Ozawa-Flynn-Wall两种方法分别计算出该药物降解过程中的三个阶段的活化能,采用多步线性回归方法,并参考常用的15种热解机理函数,确定了丹酚酸B热降解过程最佳动力学模型为Fn-F2-F1.

英文摘要：

The processes of thermal decomposition of salvianolic acid B were studied by TG-DTG.The TG-DTG curves showed that the process of mass loss of the substance proceeded in two steps.The first step could be attributed to the expulsion of water in the temperature range of 305～373 K.The second step was corresponding to the large scale degradation of salvianolic acid B in the temperature range of 413～864 K.The activation energies E of thermal degradation process of three stages were obtained by Friedman method and Ozawa-Flynn-Wall method.According to 15 mechanism functions,the possible kinetic model of thermal degradation process was estimated to be Fn-F2-F1 through the multiple linear regression method.