聚环氧琥珀酸的改性及其阻垢分散性能研究

Modification of polyepoxysuccinic acid and its scale inhibition and dispersion performances

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%。

A tercopolymer（ ESA / IA / AMPS） containing carboxylic acid and sulphonic acid groups is synthesized by using epoxysuccinic acid（ ESA） from maleic anhydride（ MA）,itaconic acid（ IA） and 2-acrylamide-2-methylpropane sulfonic acid（ AMPS） as monomers,and ammonium persulfate as initiator. The optimum reaction condition is determined as follows by single factor tests and orthogonal experiments： 3 ∶ 1 ∶ 1 mass ratio of MA,IA and AMPS,12% of the dosage of the initiator（ with respect with the total monomers）,95℃ of the reaction temperature and 4hours of the reaction time. The scale inhibition and dispersion performances of ESA / IA / AMPS are also studied. The results show that the effects of ESA / IA / AMPS and ESA / AMPS on the resistance of Ca_3（PO_4）_2 and the dispersion performance of Fe_2O_3 are basically equivalent,but the resistance of CaCO_3 is observably better than that of ESA / AMPS and PESA. The efficiency of scale inhibition against CaCO_3 and Ca_3（ PO_4）_2 are 80. 9% and 100%,respectively,when the amount of ESA / IA / AMPS is 30 mg / L.