摘要： 基于聚丙二醇（PPG）使用马来酸酐（MA）进行改性，将改性后的单体PPGAZMA与丙烯酸（AA）、烯丙基磺酸钠（ALS）进行聚合，得到阻垢剂AA-ALS-PPGAZMA。采用FTIR和¹H-NMR对合成的阻垢剂进行了表征，并考察了阻垢剂的最佳制备条件及阻碳酸钙垢性能。结果表明，当m（PPGAZMA）∶m（AA）∶m（ALS）=3∶3∶1，引发剂用量为单体总质量的6%，滴加温度为70℃，保温温度为80℃，保温反应时间为1.5 h时，合成的阻垢剂阻碳酸钙垢效果最佳，当投加量为6 mg/L时，阻垢率超过90%。AA-ALS-PPGAZMA不含磷，是一种具有工业应用前景的环保型阻垢剂。

关键词: 改性PPG多羧基阻垢剂, 碳酸钙垢, 循环冷却水

Abstract: Based on polypropylene glycol(PPG) modified with maleic anhydride(MA),the modified monomer PPGAZMA has been polymerized with acrylic acid(AA) and sodium allylsulfonate(ALS),so as to obtain a new type of scale inhibitor,AA-ALS-PPGAZMA. The synthesized scale inhibitor has been characterized by FTIR and ¹H-NMR method,and the optimal preparation conditions for the inhibitor and its scale inhibiting capability for calcium carbo-nate investigated. The results show that the scale inhibiting capability of the scale inhibitor for calcium carbonate is the best,when m(PPGAZMA):m(AA):m(ALS)=3:3:1,the initiator dosage is 6% of monomer total mass,the dropwise added temperature is 70℃,holding temperature is 80℃,and the holding reaction time is 1.5 h. When the dosage of the scale inhibitor is 6 mg/L,its scale inhibiting rate is above 90%. AA-ALS-PPGAZMA not consisting of phosphorus is a kind of environment-friendly inhibitor having promising industrial application prospect.

Key words: modified PPG polycarboxylic scale inhibitor, calcium carbonate scale, circulating cooling water

中图分类号: 

• TQ085.4