Studies on Sythesis and Utilization of Cationic Graft Starch

The cationic graft starch is redox polymerized by using(NH 4 ) 2 S 2 O 8 -NaHSO 3 as initiator under nit-rogen condition,and the im provement effect of the paper strength and filler retention is researched by us ing the cationic graft starch.