Study on Synthesis of Acrylics Copolymer Water Superabsorbent Resin

The superabsorbent resin copolymer poly(acrylic acid-acrylamide)(p(AA-AM)) was synthesized using acrylic acid(AA) and acrylamide(AM) as raw materials,Al(OH)3 as crosslinking agent and persulfate as initiator by solution polymerization method.Its absorbency in distilled water and NaCl aqueous solution was discussed,and the influence of the conditions such as monomer molar ratio,neutralization degree of AA,crosslinking agent amount,reaction temperature,initiator amount,etc.on the water absorbency performance of the said resin was investigated.The results show that the optimal synthesis process is as follows: the molar ratio of AM to AA is 0.3~0.4,the neutralization degree of AA is 70%,the molar ratio of potassium persulfate to monomers is 0.2%~0.3%,the mass ratio of Al(OH)3 to monomer is 0.03%~0.05%,the polymerization temperature is 55~60℃.The determined water absorbency is 1050g/g.