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Enzymatic degradation of polycarbonate urethanes crosslinked with carbohydrates

Wojturska J.

Polish Journal of Applied Chemistry

2011

Vol. 55, nr 3-4

141-149

The potential erosive effect of enzymes on polycarbonate urethanes has been evaluated. Polyurethanes were obtained in two-stage polyaddition process which involved diisocyanate (TMDI) and poly(carbonate)diol (Desmophen DC2200) The isocyanate prepolymers were crosslinked with carbohydrates (sucrosc, glucose, mannitol, sorbitol) to improve the ability of the enzyme to degrade polymer. Obtained samples were treated by lipase from Candida antarctica (Novozvm 735). Surface characteristic changes after enzymatic degradation were observed using confocal microscopy. The roughness parameters were determined. Also evaluation the degree of changes of the free surface energy was done. In addition, the thermal analysis of pre-degraded and post-degraded residue was performed.