AA-MAn-AMPS共聚物的合成及其阻垢分散性能

Synthesis of the New Terpolymers AA/MAn/AMPS and Their Scale Inhibitory Properties

首次以水为溶剂，过硫酸铵为引发剂，将丙烯酸（ＡＡ） 、马来酸酐（ＭＡｎ）、２丙烯酰氨基２甲基丙烷磺酸（ＡＭＰＳ） 按一定单体物质的量比进行共聚， 合成了系列ＡＡ－ ＭＡｎ－ ＡＭＰＳ共聚物。探讨了它们对Ｃａ３（ＰＯ４）２ 的阻垢率与共聚物用量、共聚物单体物质的量比的关系，研究了共聚物在稳定锌、分散氧化铁方面的性能。结果表明：共聚物Ｂ［ ｎ （ＡＡ）∶ｎ（ＭＡｎ）∶ｎ（ＡＭＰＳ） ＝ ７０∶２０∶１０］ 对Ｃａ３（ＰＯ４）２ 具有优良的阻垢分散性能， 当ｗ（Ｃａ２＋） ＝１５０ ×１０－６， ｗ（ＰＯ４３－ ）＝ ６×１０－ ６，ｐＨ＝９－０，θ＝５０ ℃，ｔ ＝ １０ ｈ，共聚物的质量分数＝１０×１０－６ 时，对Ｃａ３（ＰＯ４）２ 的阻垢率达９９－４５％ ；共聚物Ｇ［ ｎ（ＡＡ）∶ｎ（ＭＡｎ）∶ｎ（ＡＭＰＳ） ＝７０∶１５∶１５］则具有良好的稳定锌能力，当ｗ（Ｚｎ２＋）＝１０×１０－６ ，ｐＨ＝８－８～９－０，θ＝ ５０ ℃，ｔ ＝ ２４ ｈ，共聚物的质量分数＝ １０ ×１０－６ 时，对Ｚｎ（ＯＨ）２ 的阻垢率达７４－４２％ 。Ｂ、Ｇ均具有较好的分散氧化铁性能。ＡＡ－ ＭＡｎ － ＡＭＰＳ共聚物可用作工业循环冷却水的阻垢分散剂。

A series of acrylic acid/maleic anhydride/2 acrylamido 2 methylpropanesulfonic acid terpolymers (AA/MAn/AMPS) were prepared. The effects of AA/MAn/AMPS concentration and monomer ratio of the terpolymers on the scale inhibitory rate were discussed. Their capability of stabilizing Zn 2+ and dispersing Fe 2O 3 were also studied. The results showed that the new terpolymer B[n(AA)∶n(MAn)∶n(AMPS)=70∶20∶10] had excellent property of inhibiting Ca 3(PO 4) 2 scale. Under the conditions w(Ca 2+ )=150×10 -6 ,w(PO 4 3- )=6×10 -6 ,pH=9 0, θ=50℃,t=10 h,and polymer concentration=10×10 -6 , the scale inhibitory rate of B was up to 99.45%. The terpolymer G[n(AA)∶n(MAn)∶n(AMPS)=70∶15∶15] had good capability of stabilizing Zn 2+ . The scale inhibitory rate was 74.42% when w(Zn 2+ )=10×10 -6 , pH=8 8～9 0, θ=50℃, t=24 h,and polymer concentration=10×10 -6 . Both terpolymers had good properties of dispersing Fe 2O 3. They may be used as scale inhibitors and dispersing agents in industrial circulating cooling water.