通过干法工艺用马来酸酐改性聚乙烯(Zemac)修饰玉米淀粉,改变加碱量、Zemac用量及反应温度,探讨不同反应条件下产物的理化性质.结果表明,不同反应条件得到Zemac-starch取代度在0.0050～0.0113之间；红外光谱在波数为1700 cm-1～ 1730 cm-1附近未检测到明显的羰基特征吸收峰,在波数为2850 cm-1～2900 cm-1附近的CH2对称振动峰有所增强；核磁共振氢谱中在δ0.7～3.0之间出现新的吸收峰,说明淀粉发生酯化反应.不同加碱量和Zemac加量对产物黏度有明显影响；随着反应温度升高,产物黏度有所上升,适当高温条件利于反应进行；偏光显微研究表明,随着Zemac-starch取代度的提高,淀粉颗粒的中心双折射性有所减弱,但产物结晶结构无明显变化.
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