کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5201653 | 1502903 | 2014 | 8 صفحه PDF | دانلود رایگان |

Thermogravimetric analyses under air atmosphere were performed up to 973Â K on balsa wood to investigate the thermal degradation process of two types of samples aged differently: a dry balsa specimen and a hygroscopically aged material. The Kissinger method was used to determinate the kinetic parameters as the activation energy Ea, the pre-exponential factor k0 and the order of reaction n. The three constituents of balsa (i.e. hemicellulose, cellulose and lignin) were well identified and the decomposition temperature region well characterized. The presence of a large quantity of water affects the thermal decomposition behavior of wood inducing notably a maximal degradation temperature higher by 314Â K in relation to the dry material. The determined experimental kinetic parameters Ea, k0 and n are in good agreement with those find in the literature for woods. The role of diffused water in the different thermal behavior between dry and aged balsa is explained from physical and chemical points of view.
Journal: Polymer Degradation and Stability - Volume 110, December 2014, Pages 208-215