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- W2017420125 abstract "Biodegradations of random copolymers of (R)-3-methyl-4-oxa-6-hexanolide [(R)-MOHEL] with various lactones such as ε-caprolactone (24/76 ratio), δ-valerolactone (22/78), and β-propiolactone (31/69) were examined with normal or acclimated activated sludge. As a consequence, the biodegradability was found to increase in the order poly[(R)-MOHEL-ran-ε-caprolactone] > poly[(R)-MOHEL-ran-δ-valerolactone] > poly[(R)-MOHEL-ran-β-propiolactone]. The mode of biodegradation of (R)-MOHEL/lactone copolymers with enzymes (cholesterol esterase etc.) resembles that of biodegradation with activated sludge. All the copolymers degraded better than the homopoly[(R)-MOHEL] or homopoly(lactone)s. In contrast, these latter polymers are inert to hydrolytic degradation by basic or acidic buffer solution. The major biodegradation product of poly[(R)-MOHEL-ran-ε-caprolactone] (15/85) by enzymes is 6-hydroxycaproic acid as revealed by NMR spectroscopy and mass spectrometry, while the biodegradation product from poly[(R)-MOHEL-ran-δ-valerolactone] (18/82) is a linear δ-valeric acid dimer." @default.
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- W2017420125 title "Biodegradation of Novel Optically Active Polyesters Synthesized by Copolymerization of (<i>R</i>)-MOHEL with Lactones" @default.
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- W2017420125 doi "https://doi.org/10.1021/ma951759b" @default.
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