以马来酸酐(MA)为原料合成环氧琥珀酸(ESA),以过硫酸铵为引发剂,将ESA与衣康酸(IA)和2-丙烯酰胺基-2-甲基丙磺酸(AMPS)共聚,得到同时含羧基和磺酸基的ESA/IA/AMPS三元共聚物。通过单因素试验和正交试验筛选出ESA/IA/AMPS的最佳合成条件:m(MA)∶m(IA)∶m(AMPS)=3∶1∶1,引发剂质量占单体总质量的12%,反应温度为95℃,反应时间为4 h。并对ESA/IA/AMPS的阻垢分散性能进行了研究。结果表明:ESA/IA/AMPS三元共聚物的阻Ca_3(PO_4)_2和分散Fe_2O_3性能与ESA/AMPS共聚物基本相当,但阻CaCO_3效果明显优于ESA/AMPS和PESA。在加药质量浓度为30 mg/L时,ESA/IA/AMPS对CaCO_3阻垢率为80.9%,对Ca_3(PO_4)_2阻垢率为100%。 Epoxysuccinic acid (ESA) was synthesized from maleic anhydride (MA), and ammonium persulfate was used as initiator to synthesize ESA with itaconic acid (IA) and 2-acrylamido-2-methylpropanesulfonic acid AMPS) to obtain an ESA / IA / AMPS terpolymer containing both carboxyl groups and sulfonic acid groups. The optimum synthesis conditions of ESA / IA / AMPS were screened by single factor test and orthogonal test: m (MA): m (IA): m (AMPS) = 3:1:1, Of the 12%, the reaction temperature was 95 ℃, the reaction time was 4 h. The scale inhibition and dispersion properties of ESA / IA / AMPS were also studied. The results showed that the resistance to Ca_3 (PO_4) _2 and dispersed Fe_2O_3 of ESA / IA / AMPS ternary copolymer were almost the same as that of ESA / AMPS copolymer, but the resistance to CaCO_3 was better than ESA / AMPS and PESA. At the dosage of 30 mg / L, ESA / IA / AMPS showed 80.9% inhibition rate to CaCO_3 and 100% inhibition rate to Ca_3 (PO_4) _2.