Study of High Temperature Resistant Superabsorbent with Tetraallylammonium Chloride as Crosslinker

A high temperature resistant superabsorbent was prepared by solution polymerization,using tetraallylammonium chloride(TAAC)as crosslinker and ammonium persulphate(APS)as initiator respectively,based on partially neutralized acrylic acid(AA)and 2-acryloylamino-2-methyl-1-propanesulfonic acid(AMPS).The factors such as ratio of monomers,amount of crosslinker and initiator that affect the water absorbency of superabsorbent at high temperature were investigated.The superabsorbent was characterized by scanning electron microscopy(SEM).The results showed that the synthesized superabsorbent had good temperature resistance.The optimum reaction conditions are obtained as follows:the mass ratio of AMPS to AA is 0.22,and the molar ratios of initiator to the monomers,crosslinker to monomers are 0.11% and 0.14%,respectively.The water absorbency of the superabsorbent synthesized under the optimum conditions is 248g/g at 300℃.