The Synthesis And Properties Study Of Organic Macromolecule Phosphono-carboxylic Acid Cotelomer

Taking ammonium persulfate as initiator, a new type of scale and corrosion inhibitor, phosphonoarboxylic acid (POCA) cotelomer, is synthesized from solid phosphorous acid (PA), acrylic acid (AA) and 2-arylamido-2-methylpropane sulfonic acid (AMPS). The effects of the ratio of AA and AMPS, reacting time, reacting temperature, initiator amount on the reaction process and the product properties are, studied. The optimum synthesizing conditions of phosphonoarboxylic acid (POCA) cotelomer are determined by a series of orthogonal experiments. The physical and chemical indexes are demonstrated by remaining monomer content, solid content and pH tests. The product comprehensive performances (calcium tolerance, oxidation resistance, the dispersancy and scale inhibition to CaCO3, CaSO4, Ca3(PO4):, Zn(OH)2, Fe2O3) are evaluated by static tests and compared with a series of inhibitors from markets. The product molecular weight is measured by limiting viscosity coefficient (LVC) method. The product structure is characterized by IR and NMR. All the results show that the product is an excellent scale and corrosion inhibitor with good scale inhibition and dispersancy.