Abstract
A series of superabsorbent ter-polymers (SAPs) with acrylic acid, acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, crosslinked by polyethyleneglycol diacrylate-600 were prepared. The SAPs were characterized by Fourier transform infrared spectra (FTIR) and the water absorbency was measured by the Tea-bag method. Differential scanning calorimetry (DSC) was used to determine the bound water content of the different samples with various water contents. It was found that the more hydrophilic groups the ter-polymer has, the larger the bound water content is, the stronger the ability of interacting with water is, and the larger the water absorbency the ter-polymer has.
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