Polymer solutions were initially prepared to be 50 wt% of polymer. For example, 0.3 g of polymer was dissolved in 0.3 g of solvent, and crosslinker was added such that the nucleophile was equimolar with the total epoxide concentration. To control for the concentration of crosslinking points in solution, polymers were subsequently formulated to be 1 M of epoxide in solution. For copolymers containing PEGMA2000, the solutions were formulated in MeCN at 0.5 M of epoxide functional units due to the large pendent chains dominating the overall mass of the sample, and crosslinked with EDT catalyzed by LiOH.