Fig. 4
From: Design and manufacturing of superabsorbent polymers (SAPs) for agriculture in arid areas
Schematic of the NaPA and AGMA hydrogel samples after swelling for hour in 100 ml distilled water with five varying cross-linker contents, (wt.). sample number one is the lower cross-linker content, (wt.) and gradually increasing the cross-linker by the following samples.
