2006•Applied Chemical IndustryRequires access
Preparation of superabsorbent polymer by graft copolymerization of corn starch and acrylamide
Wu Lan
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Abstract
Using ceric ammonium nitrate as the initiator,a superabsorbent polymer was prepared from graft copolymer of corn starch and acrylamide.The influence of the amount of cross-linking agent,initiator and alkali,reaction temperature and reaction time on the water absorbency of the graft copolymer were investigated.The optimum reaction conditions are as follows: mole ratio of cross-linking agent to acrylamide is(1.0×10~(-5)),mole ratio of initiator to acrylamide is 3.0×10~(-3),mole ratio of alkali to acrylamide is 1.50,polymerized 2 h at 60℃.Water absorbency in distilled water and tap water in 30 min was about 600 g/g and 170 g/g respectively.