Research on the synthesis and scale inhibition performance of a new terpolymer scale inhibitor.

ABSTRACT

A new terpolymer named ß-CD-MA-SSS was produced using free-radical polymerization of ß-cyclodextrin (ß-CD), maleic-anhydride (MA) and sodium-styrene-sulfonate (SSS) as monomers, with potassium persulfate (KPS) as initiator. Its performance as a scale inhibitor to prevent deposition of calcium carbonate (CaCO3) has been investigated. Experimental results demonstrated that ß-CD-MA-SSS performed excellent scale inhibition and exhibited a high conversion rate under the following conditions initiator consisting of 6%, molar ratio of reaction monomers SSSMA = 0.81, MAß-CD = 61, reaction temperature of 80 °C, reaction time of 6 h, and dropping time of 40 min when MA was dosed as a substrate, and SSS and KPS were dosed as dropping reactants simultaneously. Use of a Fourier transform infrared spectrometer for this inhibitor showed that the polymerization reaction had taken place with the reaction monomers under the above specified conditions. Scanning electron microscopy indicated that the ß-CD-MA-SSS had a strong chelating ability for calcium (Ca(2+)) and a good dispersion ability for calcium carbonate (CaCO3).