淀粉接枝共聚动力学研究  

Kinetics of Graft Copolymerization onto Starch

作　　者：赵建青[1] 黄涛[1] 沈家瑞[1] 

机构地区：[1]华南理工大学高分子系,广州市510641

出　　处：《塑料工业》1991年第5期16-19,共4页China Plastics Industry

摘　　要：以硝酸铈铵为引发剂,研究了MMA、BA、AA和MMA-BA混合单体在木薯淀粉上的接技共聚反应;考察了聚合温度、单体的浓度、种类和配比、引发剂用量等因素对转化率、聚合速率、接枝率和接枝效率的影响。结果表明,随着聚合温度和引发剂用量的上升,接枝效率均上升;单体浓度上升,接枝率、初始聚合速率和最终转化率也上升,但接枝效率则下降;接枝率和接枝效率依MMA>BA>AA的顺序递降,使用MMA—BA混合单体则介于二者之间。The graft copolymerization of monomers of methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA)and MMA/BA onto cassva starch was studied with ceric ammonium nitrate as initiator. The effects of polymerization temperature, monomer concentration, the type and ratio, and the initiator amount on the conversion rate, polymerization rate, grafting rate and efficiency were investigated. The results showed the grafting rate and efficiency increased with the increase of the temperature and initiator amount; when the monomer concentration increased, the grafting rate, initial polymerization rate and final conversion rate increased, but the grafting efficiency decreased;the grafting rate and efficiency of BA was greater than AA, but less than MMA, and those of MMA/BA was at the middle of those of MMA and BA.

关 键 词：淀粉 塑料 接枝共聚 动力学 

分 类 号：TQ324.9[化学工程—合成树脂塑料工业]