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Measurement and Calculation of Swelling Equilibria for Water/Poly(acrylamide-sodiumallylsulfonate) Systems
1Department of Chemical Engineering, Kwangwoon University, Seoul, Korea 2Department of Industrial Chemistry, Sangmyung University, Seoul, Korea
Korean Journal of Chemical Engineering, September 1999, 16(5),
10.1007/BF02708135
10.1007/BF02708135
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Abstract
Superabsorbent poly(acrylamide-sodiumallylsulfonate) was synthesized from acrylamide (AM) and sodiumallylsulfonate (SAS) by a solution polymerization method. N,N’-methylenebisacrylamide (BIS) was used as the crosslinker; potassium persulfite (PP) and N,N,N’,N’-tetra-methylenediamine (TMEDA) were used as the redox initiator during the synthesis. The absorption capacities of the synthesized superabsorbent poly(AM-SAS) were repeatedly measured to obtain the optimal poly(AM-SAS) according to the variations of monomer concentration at 298.15 K. Its maximal absorption capacity appeared as 811 times at 0.1 mol/L among from 0.01 mol/L to 0.16 mol/L of SAS concentrations. The swelling equilibria at those conditions from 298.15 K to 318.15 K were measured and used to estimate the parameters by correlating with the Flory-Huggins model. The swelling behavior could be described by the parameters and the calculated values agreed satisfactorily with the experimental data.
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References
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