Thermal decomposition kinetics of 5-fluorouracil from thermogravimetric analysis |
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Authors: | Qing-yang Liu Yi-ling Bei Gui-bin Qi Yuan-jun Ding |
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Affiliation: | (1) School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China |
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Abstract: | The thermal decomposition kinetics of 5-fluorouracil was studied by thermogravimetric analysis methodology. The decomposition activation energy was calculated by using Ozawa method by means of TGA in nitrogen atmosphere. Moreover, the decomposition mechanism and pre-factor were obtained by Coats-Redfern and Achar methods, respectively. It is found that the decomposition activation energy of fluorouracil is 105 kJ·mol−1. The decomposition mechanisms obtained by Coats-Redfern and Achar methods are G(α)=[−ln(1−α)]2/3 and f(α)=1.5(1−α)[−ln(1−α)]1/3 respectively, lnA is 21.40 min−1. |
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Keywords: | 5-Fluorouracil Thermal Degradation Kinetics Decomposition Activation Energy Solid-state Function |
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