【摘要】 研究了CS2/H2O2体系引发玉米淀粉与丙烯酰胺的接枝共聚反应规律和机理,结果发现CS2/H2O2是一种廉价,反应条件温和的新型引发剂,在适宜条件下,接枝效率接近100%.还分析比较了CS2/H2O2引发体系与硝酸铈铵(CAN)引发体系的引发效能和接枝产品的絮凝性能,表明在复配使用时CS2/H2O2可替代CAN引发制备淀粉-丙烯酰胺接枝共聚物,满足絮凝作用的要求.更多还原

【Abstract】 The CS₂/H₂O₂ was used as initiator for the graft copolymerization of acrylamide onto alkaline maize starch.The influences of different conditions including concentration of NaOH,initiator and monomer,the molecular ratio of CS₂ to H₂O₂,polymerization temperature and time were investigated.It was shown that CS₂/H₂O₂ is a redox initiating system,which is characterized by cheapness,high efficiency and moderate reaction condictions.Under a suitable condition the graft efficiency is near 100%.The initiate ability of CS₂/H₂O₂ was compared with that of ceric ammonium nitrate.The flocculating effect of the graft copolymer which was initiated with CS₂/H₂O₂ was compared with that of the graft copolymer,which was initiated with ceric ammonium nitrate.The results indicate that initiate capacity of ceric ammonium nitrate is better than CS₂/H₂O₂,but flocculating effects are similar to each other when they are used together with Al₂（SO₄）₃.更多还原