Copolymer of acrylamide ( AM) , ciylic ( AA ) , 3-amino allyl phosphoric ( DMAAPA ) was prepared by NaHSO3-NaS2O8. The optimized conditions were build:the ratio of AM to AA:3/1 ( wt% ) , the loading of the initiator:0.5wt% ,pH:7 and the polymerization temperature:40℃. And the AM/AA/DMAAPA was identified by IR spectra. It was found that the apparent vis-cosity of the copolymer can be kept around 300mPa. S,while the viscosity retention rate of about 30% when the concentration of Na + ;Ca2+ ,Mg2+ in the 25g/L and 15g/L solution,respectively.%由丙烯酰胺、丙烯酸、3-二甲胺基烯丙基磷酸在过硫酸铵-亚硫酸氢钠氧化还原引发体系下合成了一种新型的AM/AA/DMAAPA三元共聚物.确立了最佳反应条件:AM/AA= 3/1(wt％),引发剂用量0.5wt％,pH为7,反应温度为40℃;并通过红外光谱分析确认了AM/AA/DMAAPA三元共聚物结构.当Na+;Cab,Mg2+浓度分别在25g/L,15g/L时,AM/AA/DMAAPA三元共聚物的表观粘度可保持在300mPa ·s左右,而粘度保留率约为50％.
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