用DSC法研究溴化重稀土丙氨酸配合物的热分解动力学

Thermal Decomposition Kinetics of Alanine Complexes with Heavy Rare Earth Bromides by DSC Technique

用差示扫描量热(DSC)法研究了两种溴化重稀土丙氨酸配合物的非等温热分解过程,用Ozawa法和Kissinger法计算了配合物的热分解动力学参数(E和A),用Achar微分法和Coats-Redfern积分法相结合推断出升温速率为10℃/min时,配合物热分解反应第1步和第2步的机理函数均为F2,其热分解动力学方程为dα/dt=A/β.e-E/RT(1-α)2.

Thermal decomposition kinetics of two kinds of alanine complexes with heavy rare earth bromides were studied under non-isothermal conditions by using DSC technique. The kinetic parameters（activation energy E, pre-expontial factor A） were obtained from analysis of the DSC cures by the Ozawa method, the Kissinger method,the Achar method and the Coats-Redfem method respectively. The most probable mechanism functions were suggested by comparing the kinetic parameters.