Synthesis And Application Of SA-AA-MA Copolymer On Cement And Watertreatment Industry

The development and mechanism of water-soluble polymer in concrete and water treatment industry were reviewed in this paper. The effect of monomer ratio and initiator on the performance of water-reducing agent of polyocarboxyacid series was studied by orthogonal experiment, and the product with optimum ratio was synthesized. The relative performance cgi concrete and water treatment industry were evaluated. It showed that: 1. By comparing five factors on the concrete water reducing agent's performance, the monitor optimum ratio of sodium styrene sulfonate, crylic acid and methyl acrylate was 1.0: 4.0: 1.5, where the initiator and molecular weight modifier was 4.0% and 30% separately. 2. The viscosity average molar mass of synthesized polymer have obviously effect on the dispersing performance on the concrete grain. When molecular was too small, owned electronegative groups were so little that the performance of resistance was bad. The flowage of concrete plaster increased with the increase of molar mass (below 30000) and mixed amount. 3. The mixed amount of synthesized polymer in concrete was lower than water-reducing agent of naphthaleneseries and melamine series, but have better dispersant performance on concrete grain. 4. The flowage of cement plaster remained long time when mixed amount of synthesized polymer in concrete reached 1%. and the ratio of water/cement was 0.29. 5. The concrete's strength corresponded with the rate of reducing water. The rate of reducing water was higher, and the fabric of concrete was denser, and the compression strength was stronger. The resistance of synthesized polymer was higher than naphthaleneseries and melamine series. 6. The effect of restraining Ca3(po4)2 scale of synthesized polymer was more thanpolymer of AA -AMPS -HPA. This could be that synthesized polymer had benzene makeup comparing with the polymer of AA-AMPS -HPA. It could enhance the performance of molecule's satiric hindrance, destroy the periods of forming crystal ,restrain crystal grain growing and enhance performance of restraining Ca3(po4)2 scale. 7. Dispersing performance of synthesized polymer on zincic salts would increase with the increasing of drug concentration. What,s more, it had "threshold effect". When drug concentration was low, with the increase of molecular weight, dispersing performance of synthesized polymer on zincic salts could increase. When drug concentration was high, dispersing performance synthesized polymer was the same with polymer of AA-AMPS -HPA. 8. Dispersing performance of synthesized polymer on Fe2O3 was stronger than polymer of PAA, however, the performance was the same with polymer of AA -AMPS -HPA. With the increase of concentration, the performance would also increase. And it had also "threshold effect".