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以四氟硼酸1-丁基-3-甲基咪唑([bmim]BF4)离子液体为反应溶剂,以过氧化苯甲酰-N,N-二甲基苯胺氧化还原体系为引发剂引发聚合了丙烯酰胺。采用粘度法测定了聚丙烯酰胺的相对粘均分子量,考察了聚合反应时间、反应温度、引发剂浓度对聚合物分子量和聚合反应单体转化率的影响。结果表明,丙烯酰胺可以在[bmim]BF4离子液体中进行氧化还原聚合,聚合物分子量随反应温度的升高而下降,聚合反应速率随着温度的升高而升高,得到的聚丙烯酰胺分子量可高达7.32×107以上,且水溶性良好。
Polymerization was initiated with 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim] BF4) ionic liquid as the reaction solvent and benzoyl peroxide-N, N-dimethylaniline redox system as initiator Acrylamide. The relative viscosity average molecular weight of polyacrylamide was measured by viscosity method. The effects of polymerization time, reaction temperature and initiator concentration on the molecular weight of the polymer and the conversion of polymerization monomer were investigated. The results showed that acrylamide could be redox polymerized in [bmim] BF4 ionic liquid, the molecular weight of the polymer decreased with the increase of reaction temperature, and the polymerization rate increased with the increase of temperature. The molecular weight of polyacrylamide Up to 7.32 × 107 or more, and good water solubility.