绿色环保型AA/MA/MMA三元共聚物缓蚀剂的合成及性能研究  

Synthesis and properties of environment-friendly AA/MA/MMA terpolymer corrosion inhibitor

作　　者：余嵘[1] 赫雷刚 马志祥[1] 

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《应用化工》2016年第12期2321-2325,共5页Applied Chemical Industry

基　　金：陕西省工业科技攻关项目(2015GY101);陕西省教育厅专项科研计划项目(15JK1326);2016年度研究生创新基金项目(CX201606)

摘　　要：以马来酸酐(MA)、丙烯酸(AA)、甲基丙烯酸甲酯(MMA)为单体,以过硫酸铵为引发剂,叔丁醇为分子量调节剂,采用水溶液自由基聚合法对单体进行共聚反应,合成绿色环保型三元共聚物缓蚀剂。该三元共聚物是一种水溶性聚合物,其最佳合成条件为:聚合温度80℃,聚合时间3 h,保温2.5 h。通过对共聚物的分子量分布和结构进行表征,表明该共聚物的分子量分布较窄,多种官能团协同作用,提高了缓蚀率。通过与4种传统缓蚀剂缓蚀性能的对比实验,探讨了共聚物的投加量、水样温度、水样pH值等因素对共聚物缓蚀性能的影响。结果表明,该共聚物缓蚀剂对碳钢挂片有较好的缓蚀效果,当共聚物投加量为4 mg/L,水样温度为60℃,pH值控制在9时,缓蚀率达到了最优的98.8%,缓蚀性能明显优于4种传统缓蚀剂。SEM测试聚合物缓蚀剂在碳钢挂片表面形成致密的吸附膜,使挂片与腐蚀介质隔离,特别适用于高温高碱高硬度的循环冷却水系统。The terpolymer corrosion inhibitor was synthesized by aqueous solution free radical polymerization method. Three monomers are maleic anhydride（ MA）,acrylic acid（ AA） and methyl methacrylate（ MMA）,the initiator used in this reaction is ammonium persulfate,and the tertiary butanol as molecular weight regulator. Terpolymer is a kind of water soluble polymer,which the optimum polymerization tempetature,holding time and reaction time are 80 ℃,2. 5 h and 3 h,respectively. The study of molecular weight distribution and structure of the copolymer shows that the molecular weight distribution of the copolymer was narrow and the multiple functional groups cooperate with each other,leading to the increase of corrosion inhibition rate. The influence of copolymer dosage,water temperature and water pH value on corrosion inhibition performance were discussed by comparing with four traditional corrosion inhibitors.The results showed that the terpolymer inhibition has better inhibitive effect on mild steel coupon. When additive amount of terpolymer is 4 mg/L,water temperature is 60 ℃ and pH value is controlled at 9 seperately,corrosion inhibition rate is up to 98. 8%,the corrosion inhibition performance is superior to four kinds of traditional corrosion inhibitor. SEM tests that the polymeric corrosion inhibitions formed a compact protective film on the surface of the carbon steel coupon,the coupon was protected from the corrosive medium,specially appropriate for the recirculating cooling water system with high temperature,high alkalinity and high hardness.

关 键 词：绿色环保型 三元共聚物 缓蚀剂 协同作用 缓蚀性能 吸附膜 循环冷却水 

分 类 号：TQ050.422[化学工程] TQ050.9