Abstract
The polyester amide BAK 1095 is fully degraded by microorganisms. Bacteria that can grow on this polymer were isolated from various environments, such as freshwater, saltwater, arable land, woodland and compost. The mechanism of polymer degradation was examined using selected isolates. It was discovered that the bacteria selectively cleave the polymer at its ester bonds, releasing low-molecular water-soluble oligoamides. These can then be metabolised by other microorganisms [1, 2, 3]. The isolates were also tested for their ability to break down other ester-containing polymers such as Degranil W 50, a linear polyester urethane urea. Eight of the 12 strains examined were also able to break down this polymer.
The isolated microorganisms predominantly belong to the genus Bacillus. Mesophilic, halophilic and thermophilic species were isolated. The studies show that polyester amide-degrading bacteria occur in numerous ecosystems and provide data on the microbial breakdown of random copolymers. Information was also obtained on the mechanism involved in the microbial breakdown of polyester amides.
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Wiegand, S., Steffen, M., Steger, R. et al. Isolation and Identification of Microorganisms Able to Grow on the Polyester Amide BAK 1095. Journal of Polymers and the Environment 7, 145–156 (1999). https://doi.org/10.1023/A:1022897622312
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DOI: https://doi.org/10.1023/A:1022897622312