淀粉与二甲基二烯丙基氯化铵的接枝共聚研究

Graft Copolymerization of Starch with DMDAAC

以过硫酸铵-尿素为引发剂,可溶性淀粉为原料,实现了淀粉与DMDAAC、丙烯酰胺的三元接枝共聚,着重考察了单体配比、引发剂浓度、反应温度、反应时间等因素对接枝共聚的影响,得到了该聚合反应的适宜条件:(NH4)2S2O8浓度为0.33mmol/L,淀粉与单体总量的质量比为1∶9,AM与DMDAAC摩尔比是12∶1,反应温度40℃,反应5h。接枝率可达89%,并用红外光谱、核磁共振谱图对接枝物进行了结构表征。

Using （NH4）2S2O8/C0 （NH2）2 initiation system, the modified starch was synthesized by the graft copolymerization of starch with DMDAAC. The optimum conditions of graft copolymerization are determined, Ratio of starch and monomer is 1：9, initiator concentration is 0. 33 mmol/L^-1 , monomer ratio of AM ： DMDAAC is 12 ： 1, reaction time is 5 h, reaction temperature is 40℃. The structure of the copolymer was confirmed by FTIR.