羟丙基淀粉分子量分布的变化研究  

STUDY ON THE MOLECULAR WEIGHT DISTRIBUTION OF HYDROXYPROPYL STARCH

作　　者：黄立新[1] 温其标[1] 陈玲[1] 

机构地区：[1]华南理工大学碳水化合物研究室

出　　处：《郑州粮食学院学报》1997年第4期25-29,共5页Journal of Zhengzhou Institute of Technology

基　　金：国家自然科学基金

摘　　要：凝胶渗透色谱法测定木薯淀粉、分子取代度ＭＳ从０．０４～４．８０的羟丙基淀粉ＨＰＳ的分子量分布，高ＭＳ或低ＭＳ的ＨＰＳ均为混合产物。在羟丙基醚化反应中淀粉发生降解，产物ＭＳ与分子量变化无明确的定量关系。有机相中进行的反应，羟丙基淀粉分子量随ＭＳ提高表现了从减小到增加的变化。The experimental results given in the paper concerned with the molecular weight distribution of the tapioca starch and the hydroxypropyl starch(HPS) with molar substitution(MS) from 0.04 to 4.80.All the HPS were the mixed products,whose MS had no clearly quantitative relation to the molecular weight distribution of the solid HPS.While starch was etherealized with propylene oxide in the organic solvent phase,the molecular weight of the product expressed changes from decrease to increase as raising MS,showing the reaction mechanism of hydroxypropyl etherealization of starch.

关 键 词：羟丙基反应 凝胶渗透色谱 分子量分布 

分 类 号：TS231[轻工技术与工程—粮食、油脂及植物蛋白工程]