Synthesis of terpolymer P(IA/MA/AMPS) and evaluation of its scale inhibition performance
Through radical polymerization,one novel scale inhibitor of terpolymer is synthesized with itaconic acid(IA),maleic acid(MA) and 2-acrylamide-2-methyl propane sulfonic acid(AMPS) as monomers,using ammonium persulfate as initiator in aqueous medium.The influence of ratio of monomers,reaction temperature,dosage of initiator and reaction time on the performance of polymer's scale inhibition is studied.And experimental results show the optimum reaction conditions are as follows: the ratio of monomers is n(IA)∶n(MA)∶n(AMPS)=1∶1∶1,reaction temperature is 80 ℃,the dosage of the initiator is 5%,reaction time is 2 h.The anticipated structure of the copolymer is also detected through the FT-IR spectrophotometer and the intrinsic viscosity of the copolymer and solid content are also measured.By static "bulk" inhibition performance tests,the performance of terpolymer scale inhibitor is evaluated,and when the concentration of the scale inhibitor is 50 mg/L,the scale inhibiting rate is best,reaching 93.6%.The performance indicates that P(IA/MA/AMPS) is a kind of scale inhibitor with excellent properties.