赤泥沉降用聚丙烯酸铵的反相乳液聚合及其性能研究

摘要

The ammonium polyacrylate emulsion was prepared by using new Gemini polymeric emulsifier together with OP-10 and oil phase Isopar M. The effects on monomer conversion and intrinsic viscosity of polymer by factors of HLB value, dosage of initiator, concentration of monomer, addition of EDTA, polymerization temperature and time were investigated. Results showed that under the following optimum polymerization conditions, including the mass fraction of monomer at 45%, HLB value at 8, the concentration of initiator ( V50) accounting for 0.15% of monomer concentration, the concentration of EDTA at 0.3%, the polymerization temperature of 50 ℃ and polymerization time of 6 h, the mass ratio of oil phase to water phase was 1∶3 and the monomer conversion rate reached 97. 44% with intrinsic viscosity at 885.45 mL/g, showing a good performance in red mud settlement.%采用新型Gemini乳化剂与OP⁃10复配， Isopar M为油相合成聚丙烯酸铵乳液，研究了HLB值、引发剂用量、单体浓度、EDTA添加量、聚合温度与时间等因素对单体转化率及聚合物特性黏度的影响。结果表明：控制单体的质量分数为45％，在HLB值为8、引发剂（ V50）浓度占单体浓度的0．15％、EDTA浓度为0．3％、聚合温度50℃、时间6 h条件下，合成效果最佳。在最佳条件下，乳液的油水比达到1∶3，单体转化率达到97．44％，特性粘度为885．45 mL／g，且赤泥沉降效果良好。