Vecchio Stefano, Luciano Giorgio, Franceschi Enrico
Dipartimento di Ingegneria Chimica, dei Materiali, delle Materie prime e Metallurgia, Università di Roma La Sapienza, Via del Castro Laurenziano, Roma, Italy.
Ann Chim. 2006 Nov-Dec;96(11-12):715-25. doi: 10.1002/adic.200690074.
Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) were performed on wood samples of different essences (fir, chestnut, poplar, linden and oak) before consolidation. A kinetic analysis was applied on the two-steps decomposition processes occurring in all wood samples using either the multiheating rates Kissinger equation and the isoconversional Ozawa-Flynn-Wall method that enables the variation of activation energy to be determined as a function of the degree of reaction. Taking into account both decomposition temperature and activation energy for the first degradation step oak seems to be the less stable sample. The comparison of DSC curves performed in air with those in oxygen enables to consider the role of the partial pressure of oxygen in the mechanisms of both decompositions.
在加固之前，对不同树种（杉木、栗木、杨树、椴木和橡木）的木材样本进行了差示扫描量热法（DSC）和热重分析（TG）。使用多升温速率基辛格方程和等转化率小泽-弗林-沃尔方法，对所有木材样本中发生的两步分解过程进行了动力学分析，该方法能够确定活化能随反应程度的变化。考虑到第一步降解的分解温度和活化能，橡木似乎是最不稳定的样本。将在空气中进行的DSC曲线与在氧气中进行的DSC曲线进行比较，可以考虑氧气分压在两种分解机制中的作用。
