STUDIES ON HETEROPHASIC ETHOXYLATION OF POLY(VINYL ALCOHOL)
聚乙烯醇非均相法环氧乙烷衍生化反应的研究

hrough heterophasic adduction between the hydroxyl group of poly (vinyl alcohol)(PVA) and ethylene oxide (EO),hydroxyethyl poly (vinyl alcohol) (HEPVA) with different contents of combined EO were obtained. The relationship between tacticity of PVA and its ethoxylation reactivity was discussed based on structural characterization of HEPVA by 13C-NMR and IR Spectroscopy.The different rates of increase on the content of polyoxyethylene chain in different reaction stages were also disscused.