木薯淀粉与丙烯酸接枝共聚制备淀粉增稠剂

The Preparation of Thickening Agent by Graft Copolymerization of Acrylic Acid onto Tapioca

用过硫酸盐 (过硫酸纳、钾或胺盐 )氧化法使木薯淀粉与丙烯酸接枝共聚。探索到最佳反应温度 55℃ ,反应时间 3h ,单体用量 3.1 2 5mol/L ,引发剂浓度 3.5mmol/L ,接枝百分率可达 70 %以上。

Graft copolymerization of acrylic acid onto tapioca by using persulphate as initiator was described.The graft yield was more than 70%,while reaction temperature was 55℃,reaction time was 3 hours,and concentration of monomer and initiator were 3.125 mol/L and 3.5 mmol/L respectively .At the same time,the reaction mechanism of graft copolymerization was discussed.