Synthesis and swelling property of superabsorbent starch grafted with acrylic acid/2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid

In order to develop starch-based superabsorbent polymers (SAPs) with high water absorbency, both acrylic acid (AA) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were graft copolymerized onto cassava starch, and St-g-AA-AMPS SAP was successfully synthesized. The effect of AA/AMPS molar ratio on the structure and swelling property of SAP was investigated.Introduction of AMPS units improved the storage modulus and crosslinking density of...