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采用热重法(TG)和微分热重法(DTG)对合成的新型酰氨基硫脲类化合物——N-(苯乙酰氨基)-N’-(α-萘乙酰基)硫脲进行了热稳定性研究,在25～600℃范围内有两次失重过程.通过量子化学方法计算了分子的Mayer键级,据此计算结果和热重分析结果提出了其热解机理.并运用Kissinger和Ozawa等方法计算了其热解动力学参数.得到第一阶段热解动力学方程为:dα/dt=541.5exp(-38350/RT)(1-α)2.58;第二阶段热解动力学方程为:dα/dt=505.2exp(-64810/RT)·(1-α)2.12.
The synthesized novel amido thiourea compound - N- (phenylacetamido) -N ’- (α-naphthylacetyl) thiourea was heated by TG method and DTG method Stability study, there are two weight loss processes in the range of 25 ~ 600 ℃, the Mayer bond order of the molecule was calculated by quantum chemistry method, and the pyrolysis mechanism was proposed based on the calculation results and the thermogravimetric analysis. The Kissinger and Ozawa The kinetic equation of pyrolysis in the first stage was obtained as follows: dα / dt = 541.5exp (-38350 / RT) (1-α) 2.58; the kinetic equation of the second stage pyrolysis was : dα / dt = 505.2exp (-64810 / RT) · (1-α) 2.12.