The higher degree of acrylation for the macromonomers synthesized with this catalyst concentration (0.5 mol%), was responsible for a greater degree of crosslinking. As a result, due to diffusion limitations, those materials were less prone to solvent permeation and had a higher gel fraction. Likewise, the lowest gel fraction was observed for polymer network obtained from macromonomers synthesized with 1 mol% of catalyst, consistent with previously noted low acrylation degree. Ultimately, the higher the content of double bonds (acrylic groups) in the macromonomer structure, the denser polymer network. However, macromonomers with higher molar mass may also yield networks with higher crosslinking density, because the formation of free radicals takes place at ends of the growing chains. Longer chains may simplify the segmental diffusion of macromonomer ends, thus increasing the chance that an individual functional groups can react.