改性淀粉与醋酸乙烯酯的接枝共聚反应  

Grafting Copolymerization of Vinyl Acetate onto Modified Starch

作　　者：孙建平[1] 陈兴华[1] 胡友慧[1] 

机构地区：[1]西安交通大学,西安710049

出　　处：《西安交通大学学报》2000年第8期96-99,共4页Journal of Xi'an Jiaotong University

摘　　要：研究了经过热处理的改性淀粉与醋酸乙烯酯的接枝共聚反应 ,用红外光谱验证了该反应的发生 ,探讨了引发剂的浓度、反应物浓度、反应温度等因素对接枝率和接枝效率的影响 .实验结果表明 ,在淀粉的质量浓度为 60 0 g/L、反应温度为 70℃、过硫酸铵的浓度为 0 2 6mmol/L、醋酸乙烯酯的浓度为 0 63mol/L时 ,反应条件最佳 .将该接枝共聚物作为胶粘剂 ,用于纸浆的粘合 ,并与纯淀粉粘合剂相比较 ,所压制纸板的应用性能得到了较大的改善 .Reaction of grafting copolymerization of vinyl acetate onto modified starch by heat treatment is investigated. Production of the reaction can be proved in the infrared spectrum. Studied are the effects of the concentrations of monomer, initiator and physically modified starch, temperature of reaction on grafting efficiency and grafting. The optimal condition of reaction corresponds to a concentration of 0 63 mol/L for vinyl acetate, 0 26×10 -3 mol/L for ammonium persulfate, 600 g/L for modified starch and a reaction temperature of 70 deg. Mixture of the grafting copolymer and paper pulp is pressed into a board whose properties are improved in comparison with that for an adhesion agent of non graftable modified starch.

关 键 词：物理改性淀粉 醋酸乙烯酯 接枝共聚反应 

分 类 号：O633.14[理学—高分子化学] TQ325.5[理学—化学]