The chemical structure of the ester-urethane macromonomer (component A) assessed by ATR-FTIR spectra analysis confirmed terminal functionalization (methacrylation) as indicated by lack of the characteristic absorbance band of hydroxyl groups in the spectra (Figure ) and the presence of the band at 1642 cm -1 and 940 cm -1 which correspond to stretching vibrations of C=C from the coupling of HEMA. The band at 3372 cm -1 correspond to Hbonding between N-H and the oxygen of the carbonyl group. The band around 1527 cm