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采用过硫酸铵为引发剂,丙烯酸(AA)和烯丙基聚乙二醇硫酸铵(AS10,10是聚乙二醇聚合度)为单体制备了一种用于阻磷酸钙垢的无磷阻垢剂AA/AS10,并利用红外光谱对其结构进行了表征。通过单因素法确定了合成反应的最佳工艺:单体AS10与AA的质量比为2∶1,引发剂用量为反应物单体总质量的3%、反应温度为80℃、聚合时间为1.5 h。同时考察了阻垢剂AA/AS10用量对共聚物阻磷酸钙垢性能的影响。结果表明,阻垢剂AA/AS10用量存在临界值效应,在临界值6 mg/L时,阻磷酸钙垢率约92%。扫描电镜研究表明,阻垢剂AA/AS10减小了磷酸钙固体颗粒的尺寸从而使其分散在水中而不沉积。
Using ammonium persulfate as initiator, acrylic acid (AA) and allyl polyethylene glycol ammonium sulfate (AS10, 10 is the degree of polymerization of polyethylene glycol) as a monomer to prepare a phosphate Scale inhibitor AA / AS10, and its structure was characterized by infrared spectroscopy. The optimum conditions for the synthesis reaction were determined by the single factor method: the mass ratio of monomer AS10 to AA was 2: 1, the amount of initiator was 3% of the total mass of reactants, the reaction temperature was 80 ℃ and the polymerization time was 1.5 h The effect of scale inhibitor AA / AS10 on the calcium phosphate scale resistance of copolymer was also investigated. The results showed that the scale inhibitor AA / AS10 there is a critical value of the amount of effect, at a critical value of 6 mg / L, calcium phosphate scaling rate of about 92%. Scanning electron microscopy studies showed that scale inhibitor AA / AS10 reduced the size of the calcium phosphate solid particles to disperse in water without sedimentation.