Abstract
Biodegradable copolyesters of 3-hydroxybutyrate-co-3-hydroxyvalerate (3HB-3HV) were produced byAlcaligenes eutrophus in a two-staged process, namely growth stage and nitrogen-deficient polyester-accumulation stage. When C5 was used as the sole carbon source, the copolyester contained 43 mol % of 3HV. A range of copolyesters with 0-43 mol % of 3HV could be produced by using a medium containing different concentration ratios of butyric acid C4 and C5. Tm of PHB homopolymer was 177.6©C and that of copolyester with highest 3HV mol fraction of 43% was 99.0©C. C5 concentration in the medium could be an effective means to control the polymeric composition and mechanical properties of the copolyesters accumulated in A.eutrophus.
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Chua, H., Yu, P.H.F. & Lo, W. Accumulation of biodegradable copolyesters of 3-hydroxy-butyrate and 3-hydroxyvalerate inAlcaligenes eutrophus . Appl Biochem Biotechnol 70, 929–935 (1998). https://doi.org/10.1007/BF02920203
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DOI: https://doi.org/10.1007/BF02920203