多元复合助留系统的合成与应用研究

首先合成阳离子单体N-(二甲氨基)甲基丙烯酰胺,然后用共聚法合成阳离子聚丙烯酰胺,合成过程中探讨了羟甲基二甲胺的合成工艺,当n(甲醛)∶n(二甲胺)=2∶1,反应温度为55℃,反应时间为2h时,羟甲基二甲胺的得率最高。采用正交实验,研究了共聚合反应中n(丙烯酰胺)∶n(阳离子丙烯酰胺)、温度、引发剂用量对聚合反应的影响,通过测量纸页的灰份来分析添加的助留剂的助留效果,从而得出阳离子聚丙烯酰胺的加入量和合成的最佳条件∶n(丙烯酰胺)∶n(阳离子丙烯酰胺)=8∶1,温度为55℃,引发剂质量分数为0.05%。此外,通过测量各试样的打浆度来检测所加的助留剂的助滤效果。

The Study of Multicomponent Composite for Retention Agents

N-(dimethylamine) methyl acrylamides is synthesized first then cationic polyacrylamide is synthesized by copolymerization. When formaldehyde ∶ dimethylamine is 2∶1,the reaction temperature is 55℃ and the reaction time is 2 h, the yield of hydroxyl methyl dimethylamine is the highest. Acrylamide/cation acrylamide(mol radio),temperature and the quantity of redox catalyst have influence on the copolymerization are studied by doing orthogonal test,the best effect is Acrylamide∶cation acrylamide (mol radio) is 8∶1, the reaction temperature is 55℃,the quantity of redox catalystis is 0.05% .