改性淀粉与乙烯基单体的接枝共聚反应  

GRAFTING COPOLYMERIZATION OF VINYLMONOMER ONT O MODIFIED STARCH

作　　者：孙建平[1] 孟令杰[1] 胡友慧[2] 吴洪才[1] 

机构地区：[1]西安交通大学电信学院电子工程系 [2]西安交通大学高分子材料系,陕西西安710049

出　　处：《高分子材料科学与工程》2003年第2期89-92,共4页Polymer Materials Science & Engineering

摘　　要：以过硫酸铵为引发剂 ,研究了物理改性淀粉分别与醋酸乙烯酯和丙烯酸的接枝共聚反应 ,红外光谱验证了接枝共聚反应的发生。探讨了单体浓度、引发剂浓度、淀粉浓度、反应温度和反应时间等因素对接枝效率的影响。实验结果证明 ,淀粉与醋酸乙烯酯接枝共聚反应的最佳条件是 :单体浓度为 3.90 mol/L、引发剂浓为 7.67mmol/ L、反应温度为 70℃、反应时间为 3h;淀粉与丙烯酸接枝共聚反应的最佳条件是 :单体浓度为 2 .5 0 mol/ L、引发剂浓度为 3.0 mmol/ L、反应温度为 60℃、反应时间为 3h。Reaction of grafting copolymerization of v inyl acetate and acrylic acid onto physically modified starch using ammonium per sulfate as initiator was investigated. The grafting copolymerization of vinyl ac etate and acrlyic acid onto modified starch was determinated by infrared spectru m. The effects of the concentrations of monomer, initiator and physically modifi ed starch, temperature and time of reaction on grafting effciency was studied. T he optimal condition of reaction of physically modified starch and vinyl acetate corresponds to a concentration 3.90 mol／L for vinyl acetate, 7.67 mmol ／L for ammonium persulfate, a reaction temperature of 70 ℃ and a reaction time of 3 h; the optimal condition of reaction of physically modified starch and acr ylic acid corresponds to a concentration 2.50 mol／L for acrylic acid, 3.0 mmol／L for ammonium persulfate, a reaction temperature of 60 ℃and a reactio n time of 3 h.

关 键 词：乙烯基单体 接枝共聚反应 物理改性淀粉 醋酸乙烯酯 丙烯酸 

分 类 号：TQ325.6[化学工程—合成树脂塑料工业]