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SOLUTION STUDIES OF CELLULOSE TRICARBANILATES OBTAINED IN HOMOGENEOUS PHASE

机译:均相中获得的纤维素三羧酸盐的溶液研究

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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. (C) 1995 John Wiley and Sons, Inc. [References: 17]
机译:将许多纤维素样品在二甲基乙酰胺/ LiCl中进行均相氨基甲酸酯化。该过程是定量的,并且可以通过元素分析和紫外光谱验证得到完全替代的产品。通过在四氢呋喃中的粘度和光散射测量来表征三氨基甲酸酯化的样品。我们的结果与关于异相中获得的产品的文献报道相吻合。使用通用和线性校准,进行凝胶渗透色谱法以评估母体纤维素的分子量分布。色谱技术不足以显示高聚合度的样品。 (C)1995 John Wiley and Sons,Inc. [参考:17]

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