Solution studies of cellulose tricarbanilates obtained in homogeneous phase
Solution studies of cellulose tricarbanilates obtained in homogeneous phase
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均相三氨基甲酸纤维素的溶液研究
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
B. Focher
中科院分区：
文献类型：
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作者：
M. Terbojevich;A. Cosani;M. Camilot;B. Focher
许多纤维素样品在二甲基乙酰胺/氯化锂中进行均相苯胺化。该过程是定量的，并导致一个完全取代的产品，如元素分析和紫外光谱验证。在四氢呋喃中，通过粘度和光散射测量对三氨基甲酸酯样品进行了表征。我们的结果是在良好的协议与文献中报道的，关于在非均相得到的产品。凝胶渗透色谱法进行评价母体纤维素的分子量分布，使用通用和线性校准。色谱技术不适用于显示高聚合度的样品。John Wiley & Sons，Inc.
A number of cellulose samples was submitted to homogeneous phase carbanilation in dimethylacetamide/LiCl. The process is quantitative and leads to a completely substituted product, as verified by elemental analysis and UV spectroscopy. Tricarbanilated samples were characterized by viscometric and light-scattering measurements in tetrahydrofuran. Our results are in good agreement with those reported in the literature, concerning products obtained in the heterogeneous phase. Gel permeation chromatography was performed for evaluating the molecular weight distribution of the parent cellulose, using both universal and linear calibration. The chromatographic technique is not adequate for samples exhibiting a high degree of polymerization. © 1995 John Wiley & Sons, Inc.