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. Author manuscript; available in PMC: 2022 Feb 10.
Published in final edited form as: J Control Release. 2020 Dec 27;330:575–586. doi: 10.1016/j.jconrel.2020.12.045

Figure 1. Rheological properties and swelling behavior of PEG hydrogels with different polymer concentrations.

Figure 1.

(A-D) Rheological analysis of PEG hydrogels with different polymer concentration. Gels were placed in the PBS solution and measured by a rheometer at room temperature. G’: storage modulus; G”: loss modulus; tan δ: damping factor, and tan δ = G” / G’. (E) Swelling isotherms of PEG hydrogels in water at room temperature. Ht (%): swelling ratio at time t. (F) Water content in PEG hydrogels over time. Wt (%): water content at time t. (G) Experimental data of water content and time t plotted according to Equation (5) for different PEG hydrogels. (H) Experimental data of water weight and time t plotted according to Equation (7) for different PEG hydrogels. Mt: water weight at time t; Minfinite: water weight at equilibrium. All values were shown as Mean ± SD, yet note that error bars in F, G, and H were too small to be seen.