The effect of urease secreted enzymes of new micrococcus strain on biodegradation of poly (ether- urea- urethane)

Biodegradable Poly (ether- urea- urethane) (PEUU) was synthesized using L-Leucine anhydride (LA) 4,4- methylene- bis (4- phenyl isocyanate) (MDI) and PEG 1000. A kind of micrococcus bacteria isolated from basic culture medium containing PEU was used to study degradability of polymer. This strain was cultured on different media such as NA and urea to induce different enzymes including urease and peptidase. The results of growth of micrococcus on NA and urea agar media showed peptidase and urease activities, respectively which degrade peptide and urethane- urea linkages of polymer consequently. The degradation pathway of polymer was followed by TGA, SEM, FT-IR and loss measurement techniques

کلیدواژه ها:

poly (ether-urea-urethane) ، micrococcus strain ، enzymatic degradation ، urea agar medium