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. Author manuscript; available in PMC: 2016 Oct 28.
Published in final edited form as: Ind Eng Chem Res. 2015 May 11;54(42):10197–10205. doi: 10.1021/acs.iecr.5b01193

Figure 1.

Figure 1

Higher swelling ratio was obtained with P(MAA-g-EG) hydrogels and those formulations containing more hydrophilic cross-linkers. pH-dependent equilibrium weight swelling ratio, q, of (A) P(MAA-g-EG) and (B) P(MAA-co-NVP) hydrogel disks synthesized with TEGDMA, PEGDMA-400, and PEGDMA-1000 as cross-linkers. Disks from each formulation were placed in DMGA buffer (pH value ranging from 2.0 to 8.0) for 15 min. The weight–swelling ratio was calculated by dividing the swollen weight of the disk by the dry weight of the disk.