Synthesis and Characterization of Linear Polycarboxylate Dispersant of Glacial Acrylic Acid-Maleic Acid-Sodium Methallylsulfonate for Ceramics

摘要

In this research, linear polycarboxylate of glacial acrylic acid (GAA), maleic acid (MA) and sodium methallylsulfonate (SMAS) dispersant polymer as a water reducer was synthesized for ceramic applications by using redox free radical initiation system consisting sodium persulfate (Na2S2O8) and sodium hypophosphite (Na2H2PO2) through aqueous solution free radical polymerization. The structural characterizations were done using FT-IR and 'H NMR. The molecular weight of polymer was analyzed using GPC and residual monomer levels in final product were measured with HPLC. Measured the ceramic flow times, viscosities at dispersant dosage rate 0.30 % (dry slurry based) and the results indicated that linear polycarboxylate showed a good performance at the mol ratios of GAA:MA:SMAS = 60:20:20, ratios of initiator (Na2S2O8) and chain transfer agents (Na2H2PO2) 2:6 % at, 85 °C polymerization temperature and 2 h reaction time.