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.
出处
《郑州粮食学院学报》
CAS
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
关键词
羟丙基反应
凝胶渗透色谱
分子量分布
modified starch
hydroxypropyl reaction
gelpermeation chromatography
molecular weight distribution
