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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Biomater Sci. 2016 Mar;4(3):405–411. doi: 10.1039/c5bm00256g

Fig. 4.

Fig. 4

Effects of the crosslinking mechanism and crosslink functionality on BSA release. Chain-growth-polymerized hydrogels (light grey) were constructed from 4 kDa PEGDA (15% (w/v)) and step-growth-polymerized hydrogels were constructed from 4 kDa 4-arm (black) or 8-arm (dark grey) PEG (15% (w/v)). (A) Effects of the crosslinking mechanism and crosslink functionality on the BSA release efficiency (Mt/MLoad × 100%). (B) Effects of the crosslinking mechanism and crosslink functionality on fractional BSA release (Mt/M∞). (C) Effects of the crosslinking mechanism and crosslink functionality on BSA diffusivity. Data are presented as mean ± standard deviation (n = 4). *p < 0.05 compared to chain-growth-polymerized hydrogels;#p < 0.05 compared to step-growth-polymerized hydrogels constructed from 4-arm PEG.