The 2D-COS analysis of ATR-FTIR of the polymer network spectra (Figure ) pointed out the degradation of the ester and urethane bond within component A by lipase action that was indicated on synchronous spectra by set of autobands at 1733 cm -1 , 1551 cm -1 , 1451 cm -1 and 1413 cm -1 , 1177 cm -1 (Figure ).