右旋糖酐
化学
电位滴定法
聚电解质
一元酸
多糖
磷酸化
滴定法
生物化学
尿素
聚合度
傅里叶变换红外光谱
聚合
色谱法
有机化学
高分子化学
化学工程
聚合物
离子
工程类
作者
Dana Mihaela Suflet,Gabrielle Charlotte Chiţanu,Jacques Desbrières
标识
DOI:10.1016/j.carbpol.2010.07.007
摘要
New results regarding the synthesis and characterization of water-soluble phosphorylated dextran (PDex) are presented. The phosphorylation was made by reaction of dextran with phosphorous acid in molten urea. The structure of phosphorylated product was investigated by elemental analysis, by titration of acidic groups and by FTIR and NMR spectroscopy. It was found that phosphorylated dextran prepared in these conditions is a monobasic dextran phosphate with (H)P(O)(OH) groups. The degree of polymerization of PDex was found comparable to the parent dextran, suggesting that polysaccharide chain was not degraded during phosphorylation. The polyelectrolyte behavior was studied by potentiometric and conductometric titration and by viscometric measurements.
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