将玉米淀粉酸解氧化后，采用过硫酸铵为引发剂，与丙烯酸胺接枝共聚，得到复合改性淀粉。通过考察各因素对接枝共聚产物接枝百分率和接枝效率的影响，确定接枝共聚反应的条件为：接枝反应温度50 ℃； 反应时间3 h； 淀粉与丙烯酰胺质量比0.8。通过对复合变性淀粉工艺条件的验证性试验及其的理化性能分析，证明复合变性淀粉适于制备乳液胶黏剂。
The corn starch was acidthinned and oxidized，then grafted copolymerization acrylamide，so composite modified starch is synthesized. By examining the effect of each element on G(grafting percentage) and GE(grafting effection) of graft copolymerization production，the condition of graft copolymerization reaction were determined：50 ℃ of graft reaction temperature，3 h of reaction time，0.8 of the mass ratio of starch to acrylamide. By validating test of technology condition for composite modified starch and analysis on its physical and chemical properties，composite modified starch suitable for preparing wood adhesive was testified.
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