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The thermal decomposition of abietic acid in air was investigated under non-isothermal condition using thermogravimetric analysis-differential thermal analysis(TGA-DTA) technique with heating rates of 5,10,15 and 25 K·min 1.The non-isothermal kinetic parameters were obtained via the analysis of the thermogravimetric and differential thermogravimetric(TG-DTG) curves by using Flynn-Wall-Ozawa method and Kissinger method.The thermal decomposition mechanism of abietic acid was studied with four integral methods(atava-esták,MacCallum-Tanner,ordinary integral and Agrawal).The results show that the thermal decomposition mechanism is nucleation and growth,and the mechanism function is Avrami-Erofeev equation with n equates 1/2.The activation energy and the pre-exponential factor are 64.04 kJ·mol-1 and 5.89×10 5 s-1,respectively.
The thermal decomposition of abietic acid in air was investigated under non-isothermal condition using thermogravimetric analysis-differential thermal analysis (TGA-DTA) technique with heating rates of 5, 10, 15 and 25 K · min 1. The non-isothermal kinetic parameters were obtained via the analysis of the thermogravimetric and differential thermogravimetric (TG-DTG) curves by using Flynn-Wall-Ozawa method and Kissinger method. thermal decomposition mechanism of abietic acid was studied with four integral methods (atava-esták, MacCallum-Tanner , ordinary integral and Agrawal. The results show that the thermal decomposition mechanism is nucleation and growth, and the mechanism function is Avrami-Erofeev equation with n equates 1 / 2. The activation energy and the pre-exponential factor are 64.04 kJ · mol -1 and 5.89 × 10 5 s-1, respectively.