Summary
The decomposition of polyurethane, measured gravimetrially or using infrared spectrophotometry, was found to be more complete in polyurethane based on polyester and only very small in polyurethane based on polyether. In the presence of clay minerals the decomposition was inhibited. If positive, the decomposition of polyurethane followed the sequence: remaining free isocyanates→urea and amide groups→urethane groups→isocyanuric acid rings.
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Filip, Z. Decomposition of polyurethane in a garbage landfill leakage water and by soil microorganisms. European J. Appl. Microbiol. Biotechnol. 5, 225–231 (1978). https://doi.org/10.1007/BF00579343
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DOI: https://doi.org/10.1007/BF00579343