Studies of crosslinked poly(AM-MSAS-AA) gels. I. Synthesis and characterization

✍ Scribed by Wen-Jing Zhou; Ke-Jun Yao; Mark J. Kurth

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 211 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970502)64:5<1001::aid-app18>3.0.co;2-6

✦ Synopsis

Novel superabsorbent copolymers were prepared from acrylamide ( AM ) , sodium methallylsulfonate ( MSAS ) , sodium acrylate ( AA ) , and N,N-methylenebisacrylamide ( BisA ) in aqueous solution using potassium persulfate ( KPS ) / N,N,N ,N -tetramethylethylenediamine ( TMEDA ) as the redox initiator. The copolymers were characterized by Fourier transform infrared spectroscopy ( FTIR ) , scanning electron microscopy ( SEM ) , and thermogravimetric analysis ( TGA ) . The experimental results show that absorbency increases with an increase in crosslinker concentration but decreases with excessive crosslinking. The ionic groups in the polymer network significantly increase the equilibrium swelling. Water retention at pressures of 1 -10 kg / cm 2 and temperatures of 60 and 100ЊC are also reported.