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. Author manuscript; available in PMC: 2017 Jul 15.
Published in final edited form as: Acta Biomater. 2016 May 11;39:1–11. doi: 10.1016/j.actbio.2016.05.015

Figure 1.

Figure 1

(A) Schematic of hydrogel formation by a step-growth photo-clickable reaction from macromers of 8-arm PEG-caprolactone functionalized with norbornenes and PEG dithiol crosslinker in the presence of a photoinitiator (PI) and ultraviolet light (hv). (B) Compressive modulus as a function of time for hydrogels prepared from PEG-CAP-NOR-II (n=2–3). (C) Mass swelling ratio (q) as a function of time for hydrogels prepared from PEG-CAP-NOR-II (n=2–3). Acellular hydrogels were placed in either serum-free or serum-plus media.