Gel permeation chromatography (GPC) was used to determine the final molecular weights and molecular weight distributions of synthesized macromonomers. GPC measurements were In order to assess the gel fraction, the cross-linked samples were weighted (W initial ) and then refluxed for 6 hours in Soxhlet apparatus (Behr Labor-Technik, Germany) in EtOAc, which was found to be a suitable solvent for the macromonomers. The samples were dried under reduced pressure until a constant mass (W final ) was achieved. The gel fraction was calculated according to following equation (Equation ):