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. Author manuscript; available in PMC: 2018 Mar 30.
Published in final edited form as: Acta Biomater. 2013 Apr 6;9(7):7362–7370. doi: 10.1016/j.actbio.2013.03.041

Figure 2.

Figure 2

FT-IR spectra of photocrosslinked PGS-CinA, PGS-CinA pre-polymer (DS = 35%) and PGS pre-polymer. The absorbance peak at 3423 cm−1 that is associated with hydrogen-bonded hydroxyl groups is attenuated via cinnamate modification of PGS pre-polymer. The vinylene C=C stretching peak at 1637 cm−1 is abolished after the photodimerization of PGS-CinA pre-polymer into the final crosslinked network.