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Superabsorbents starch grafted sodium polyacrylate was prepared by inverse suspension polymerization, using toluene as the continuous phase, potassiun persulfate as the initiator. The effect of suspension parameters, such as volume ratio of continuous phase and dispersed phase,type and dosage of suspending agents, on water absorbency of the starch grafted polymer was studied.Different starch derivatives were also investigated.Superabsorbents made of cationic starch has higher water absorbency than that made of native corn starch.