Citation: LIU Mingzhu, CHENG Rongshi, WU Jingjia. PREPARATION AND SWELLING PROPERTIES OF SUPER-ABSORBENT POLYMER[J]. Chinese Journal of Polymer Science, ;1996, 14(1): 48-56. shu

PREPARATION AND SWELLING PROPERTIES OF SUPER-ABSORBENT POLYMER

Received Date: 15 September 1994

A super-absorbent polymer is prepared by graft polymerizing acrylamide (AM) ontopotato starch using ceric ammonium nitrate (CAN) and N, N′-methylene-bis-acrylamide(bisAM) as an initiator and cross-linking agent respectively, and then subjecting the potatostarch-poly(acrylamide) (PAM) graft copolymer (SPAM ) to alkaline saponification. Thewater absorbency (WA) of the sample is nearly 5000 g H2O/g for dry sample in 24 hat room temperature and is far larger than that of reported in the literature[1]. The variables affecting the WA were investigated and optimized,they were:concentrations of potato starch,AM,CAN and bisAM were 26.3g/L,1.14 mol/L,10.3 mmol/L and 0.53 mmol/L,respectively.The amount of sodium hydroxide was 15 g and the temperatures of graft copolymerization and saponification reactions were 60℃ and 95℃.The time of graft copolymerization and saponification reactions was 2 h,respectively.
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