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以环氧琥珀酸(ESA)、衣康酸(IA)和苯乙烯磺酸钠(SS)为单体,过硫酸铵为引发剂,通过共聚反应得到了含有羧基和磺酸基的三元共聚物ESA/IA/SS,利用FTIR对其结构进行了表征。考察了单体质量比、引发剂用量、聚合温度和聚合时间对ESA/IA/SS阻碳酸钙垢性能的影响。实验结果显示:ESA/IA/SS的最佳合成条件为m(马来酸酐,MA)∶m(IA)=3∶1,SS的加量为20%(占单体总质量,下同),引发剂的加量为12%,聚合温度85℃,聚合时间4 h,此时得到的产品黏均相对分子质量为1 176.3。对ESA/IA/SS的阻垢和分散氧化铁性能进行了测定,并与ESA/SS和聚环氧琥珀酸(PESA)进行了比较。实验结果表明:当阻垢剂的质量浓度均为50 mg/L时,ESA/IA/SS与PESA的阻碳酸钙垢性能相当,PESA的阻垢率为72.3%,ESA/IA/SS的阻垢率为71.5%,而ESA/SS的阻垢率仅为44.2%。当阻垢剂的质量浓度均为40 mg/L时,ESA/IA/SS的阻磷酸钙垢性能远高于PESA,PESA的阻垢率仅为7.0%,ESA/IA/SS的阻垢率为96.8%。同时,当加入阻垢剂的质量浓度为30 mg/L时,ESA/IA/SS还具有一定的分散氧化铁性能,加药后Fe Cl3溶液的透光率为72.6%。
The copolymerization of epoxysuccinate (ESA), itaconic acid (IA) and sodium styrenesulfonate (SS) as monomers and ammonium persulfate as initiator gave terpolymers containing carboxyl groups and sulfonic acid groups The structure of ESA / IA / SS was characterized by FTIR. The effects of monomer mass ratio, initiator amount, polymerization temperature and polymerization time on the performance of ESA / IA / SS calcium carbonate scale were investigated. The results showed that the optimal synthesis conditions of ESA / IA / SS were m (MA): m (IA) = 3:1, the addition amount of SS was 20% (accounting for the total monomer mass, the same below) , The amount of initiator is 12%, the polymerization temperature is 85 ℃ and the polymerization time is 4 h. At this time, the viscosity average molecular weight of the product is 1 176.3. The ESA / IA / SS scale inhibition and dispersion of iron oxide were measured and compared with ESA / SS and polyepoxysuccinic acid (PESA). The experimental results show that ESA / IA / SS and PESA have similar performance of calcium carbonate scale inhibition when the concentration of scale inhibitor is 50 mg / L, the inhibition rate of PESA is 72.3%, the resistance of ESA / IA / SS The scale was 71.5%, while the ESA / SS scale inhibition was only 44.2%. The scale inhibition of ESA / IA / SS was much higher than that of PESA when the concentration of scale inhibitor was 40 mg / L, and the scale inhibition rate of PESA was only 7.0%. The scale inhibition rate of ESA / IA / SS 96.8%. At the same time, ESA / IA / SS also had a certain degree of dispersion of iron oxide when the mass concentration of scale inhibitor was added at 30 mg / L. After the addition of FeCl3, the transmittance of the solution was 72.6%.