IR STUDIES OF CARBONS .2. THE VACUUM PYROLYSIS OF CELLULOSE
IR STUDIES OF CARBONS .2. THE VACUUM PYROLYSIS OF CELLULOSE
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DOI：
10.1016/0008-6223(83)90092-1
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发表时间：
1983-01-01
期刊：
影响因子：
10.9
通讯作者：
LOW, MJD
中科院分区：
文献类型：
--
作者：
MORTERRA, C;LOW, MJD
纤维素在真空中从22 ° C至765°C的热解之后是IR光热束偏转光谱。在热解的各个阶段记录的一系列光谱表明，虽然主要分解发生在300°C附近，但一些分解发生在低至190°C的温度下，并形成高度吸收的芳族体系。在300-400°C范围内，主要是脂肪族材料的混合物占主导地位，但在500°C以上，其程度会下降，被芳香族性质的混合物取代。进一步脱气导致离散的光谱特征在700°C附近下降和消失;连续吸收仍然存在。乐队的分配进行了讨论。特别是碳的1600 cm− 1光谱带，同位素研究显示不属于羰基。但被认为是C = C模式，其通过由结合氧引起的不对称性而使IR活化。
The pyrolysis of cellulose in vacuum from 22 to 765°C was followed by IR photothermal beam deflection spectroscopy. Series of spectra recorded at various stages of pyrolysis showed that although the main decomposition occurred near 300°C, some decomposition occurred as low as 190°C with the formation or highly absorbing aromatic systems. Mixtures of predominantly aliphatic material predominate in the 300–400°C range but decline in extent to be replaced by mixtures of aromatic nature above 500°C. Further degassing causes discrete spectral features to decline and disappear near 700°C; a continuum absorption remains. Band assignments are discussed. In particular, the 1600 cm−1band of spectra of carbons is shown by isotopic study not to be ascribed to carbonyls. but is thought to be a C = C mode made IR active by asymmetry caused by bound oxygen.