醋酸纤维素取代基分布与性质的关系  

The Relationship of Distribution of Degree of Substitution and Properties of Cellulose Acetate

作　　者：梅洁[1] 欧义芳[1] 陈家楠[1] 

机构地区：[1]中国科学院广州化学研究所纤维素化学重点实验室,广州510650

出　　处：《纤维素科学与技术》2002年第1期12-19,共8页Journal of Cellulose Science and Technology

摘　　要：分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。C-NMR spectra of ring carbons and O-acetyl carbonyl carbons of cellulose acetate (CA) in pyridine-d5 were analyzed and degree of substitution of three different kinds of hydroxyl groups have been obtained. It was found that the difference of properties of CA which have the same overall degree of substitution but some obtained by hydrolysis reaction and others obtained by acetylation have different properties is because of the difference of distribution of the substituent group.

关 键 词：^13C-NMR 纤维素 醋酸纤维素 取代度 吡啶 取代基分布 性质 

分 类 号：TQ352.79[化学工程]