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《Journal of Lanzhou University》 1991-03
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Studies on the Water Absorbent Macromolecular Materials (Ⅱ)——Study on the Synthesis and Properties of crosslinked Polyacrylate Sodium

Liu Mingzhu;Wu Jingjia;Ju Yuhong Department of Chemistry,Lanzhou University,Lanzhou,730000  
In this paper, two kinds of water absorbent macromolecular materialshave been prepared by solution polymerization. They are PAS-8801 andPAS-8802. The initiator used was potassium persulfate (K_2S_2O_8), thedegree of crosslinking was controlled by monovalent cation. The optimumsof polymerization have been obtained by choosing neutralization degree,amount of initiator, reaction temperature and time. The water absorbentand thermal properties of the sample have been studied. The waterabsorbencies of the sample are above 800 g H_2O/g dry sample. Theresult of experiment showed the sample have not only larger absorbencybut also good water retention and thermal stability.
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