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首页> 外文期刊>Journal of Applied Polymer Science >Effect of cellulose crystallinity on the progress of thermal oxidative degradation of paper
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Effect of cellulose crystallinity on the progress of thermal oxidative degradation of paper

机译：纤维素结晶度对纸张热氧化降解过程的影响

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Dynamic differential scanning calorimetry (DSC) using paper samples of different compositions has evidenced varying degrees of endothermic activity prior to the exothermic, oxidative decomposition of cellulose under static air, Whereas cotton cellulose papers displayed a significant endothermic activity, wood-pulp papers showed a much less pronounced effect or no activity at all. DSC measurements using microcrystalline cellulose submitted to different extents of milling indicated that the observed endotherm is related to the degree of crystallinity of cellulose. Crystallinity decrease is accompanied by a decrease in the area of the endothermic peak. Thermal disruption of cellulose crystalline domains is therefore believed to be the reason for the appearance of an endotherm in the thermograms of paper. The higher degree of crystallinity of cotton cellulose in comparison to wood-pulp cellulose accounts for the more pronounced endothermic activity observed for cotton papers. (C) 2000 John Wiley & Sons, Inc. [References: 9]
机译：动态差示扫描量热法（DSC）使用不同组成的纸张样品已证明，在静态空气中纤维素放热，氧化分解之前，吸热活性的程度不同，而棉纤维素纸显示出显着的吸热活性，木浆纸显示出很大的吸热活性。效果较差或完全没有活性。使用微晶纤维素进行不同程度碾磨的DSC测量表明，观察到的吸热与纤维素的结晶度有关。结晶度降低伴随着吸热峰面积的降低。因此，纤维素晶域的热破坏被认为是在纸张的热分析图中出现吸热的原因。与木浆纤维素相比，棉纤维素的结晶度更高，这说明了棉纸的吸热活性更为显着。 （C）2000 John Wiley＆Sons，Inc. [参考：9]

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