| 枞酸的热分解反应 |
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| 引用本文： | 刘红军,谭卫红,周永红,张猛. 枞酸的热分解反应[J]. 林业科学, 2012, 48(8): 123-128 |
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| 作者姓名： | 刘红军 谭卫红 周永红 张猛 |
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| 作者单位： | 中国林业科学研究院林产化学工业研究所 国家林业局林产化学工程重点开放性实验室 南京210042 |
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| 基金项目： | 国家“十二五”科技支撑项目(2012BAD32B05) |
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| 摘 要： | 使用纯度99.32％的环状二萜化合物枞酸样品,通过TG,DCS,TG-MS研究枞酸的热分解反应和反应机制,得到其热分解反应的活化能Ea在质量损失20％,40％,60％时分别为12.76,12.96,11.81 kJ·mol-1,从362.2℃开始开环分解、气化,气化热△H为2096.4 J·g-1,分解质量损失的主要物质为m/z 40 ～ 90的小分子,分解反应过程首先是脱去异丙基、羧基,然后开环分解,枞酸受热的相变过程中融熔热△H为49.3 J·g-1,固态比热容均值是1.469 J·g-1K-1,液态为1.463 J·g-1K-1,由固体变液体的相变比热容是4.769 J·g-1K-1
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| 关 键 词： | 枞酸 热分析 热分解动力学 比热容 |
Thermal Decomposition Reaction of Abietic Acid |
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| Liu Hongjun , Tan Weihong , Zhou Yonghong , Zhang Meng. Thermal Decomposition Reaction of Abietic Acid[J]. Scientia Silvae Sinicae, 2012, 48(8): 123-128 |
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| Authors: | Liu Hongjun Tan Weihong Zhou Yonghong Zhang Meng |
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| Affiliation: | Liu Hongjun Tan Weihong Zhou Yonghong Zhang Meng (Institute of Chemical Industry of Forest Products, CAF Key and Open Lab. on Forest Chemical Engineering, SFA Nanjing 210042) |
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| Abstract: | The decomposition reaction and mechanism of abietic acid with the purity 99.32% was tested by thermogravimetric analysis (TG),differential scanning calorimetry (DSC) and thermogravimetric analyzer coupled to a quadrupole mass spectrometer(TG-MS). The thermal decomposition activation energy of abietic acid at 20%(TG) , 40%(TG) , 60%(TG) were 12.76, 12.96, 11.81 kJ·mol-1, respectively. The results of TG-MS showed that there are micromolecules, whose m/z are between 40 to 90 when decomposed after 362.2 ℃, which proved that the decomposition process of abietic acid is first off isopropyl, carboxyl, and then open-ring. The fusion heat, heat of gasification, heat capacity of solid state, liquid state and phase change form solid to liquid were 49.3 J·g-1, 2 096.4 J·g-1, 1.469 J·g-1K-1, 1.163 J·g-1K-1 and 4.769 J·g-1K-1, respectively. |
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| Keywords: | abietic acid thermal analysis thermal decomposition kinetics heat capacity |
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