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/cm2 and temperatures of 60 and 100°C are also reported.
|Original language||English (US)|
|Number of pages||7|
|Journal||Journal of Applied Polymer Science|
|State||Published - May 2 1997|
- Water absorbent
ASJC Scopus subject areas
- Polymers and Plastics