Composition and Performance of Spherical Superabsorbent Copolymer

Abstract The superabsorbent copolymers of partially neutralized acrylic acid(AA) and acrylamide(AM) were prepared by inverse suspension polymerization in the presence of crosslinking agent of N,N′-methylenebisacrylamide.The influence of monomer composition on copolymer composition,absorption characteristics and microsphere morphology was investigated.The reactivity ratio of AM was smaller than that of AA in the copolymerization so that the copolymer composition of microspheres was inhomogeneous in batch process.The water absorption capacity of crosslinked microspheres decreased with the increase of AM contents.But the absorptions of copolymer in salinity water exhibited synergic efficiency when the content of AM in monomer was 30%(mass ratio).The microsphere morphology of polymer of partially neutralized AA was spheric regularly,while that of the copolymer of AA and AM was spheric irregularly.

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Received 2007-01-15; published 2007-01-15

Cite this article:

XU Yong-shen,PAN Fan-fan,ZHU Li-ping,YUAN Cai-deng.Composition and Performance of Spherical Superabsorbent Copolymer[J] Chemcial Industry and Engineering, 2007,V24(1): 20-23