首页> 外文期刊>Journal of Wood Chemistry and Technology >THE CHEMICAL MODIFICATION OF SCOTS PINE WITH SUCCINIC ANHYDRIDE OR OCTENYL SUCCINIC ANHYDRIDE. Ⅱ. REACTION KINETICS
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THE CHEMICAL MODIFICATION OF SCOTS PINE WITH SUCCINIC ANHYDRIDE OR OCTENYL SUCCINIC ANHYDRIDE. Ⅱ. REACTION KINETICS

机译:用松软酸酐或辛基松软酸酐对短小松进行化学修饰。 Ⅱ。反应动力学

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The kinetics of the pyridine-catalyzed reaction of succinic anhydride (SA) and octenyl succinic anhydride (OSA) with Scots pine (Pinus sylvestris) have been investigated, and activation energies determined. The activation energies for surface reactions between wood and SA or OSA were determined as 79.5 (±13.0) and 29.6 (± 4.6) kJ/mol respectively. The low value of the latter activation energy, suggests that hydrogen bond breaking is a rate determining step with the reaction of OSA with wood. With SA the activation energy is of a similar magnitude to literature values for anhydride-alcohol reactions. The kinetics of reaction over extended time was analysed to see if diffusion dominated the process, complex profiles were observed which were not amenable to simple analysis.
机译:研究了吡啶催化琥珀酸酐(SA)和辛烯基琥珀酸酐(OSA)与苏格兰松树(樟子松)的反应动力学,并确定了活化能。木材与SA或OSA之间的表面反应活化能分别确定为79.5(±13.0)和29.6(±4.6)kJ / mol。后者活化能的值较低,表明氢键断裂是OSA与木材反应的决定速率的步骤。使用SA,活化能的大小与酸酐-醇反应的文献值相似。分析了长时间内反应的动力学,以了解扩散是否主导了该过程,观察到复杂的分布图,这些分布图不适合简单分析。

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