Novel biodegradable copolyesters containing blocks of poly(3-hydroxyoctanoate) and poly(epsilon-caprolactone): synthesis and characterization |
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Authors: | Timbart Laurianne Renard Estelle Langlois Valérie Guerin Philippe |
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Institution: | LRP, UMR 7581, Université Paris XII, 2 à 8, rue H. Dunant, 94 320 Thiais, France. |
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Abstract: | Novel biodegradable polyester block copolymers have been synthesized by using well-defined poly(3-hydroxyoctanoate) (PHO) oligomers having a hydroxyl end group and an ester end group with M(n) values of 800, 2,500, 5,300, 8,000, or 20,000 as an elastomeric soft segment and poly(epsilon-caprolactone) as a more crystalline segment. These PHO oligomers prepared by methanolysis were subjected to block copolymerization with epsilon-caprolactone. The chemical structure of the copolymers was confirmed by (1)H NMR and (13)C NMR spectroscopy. All the copolyesters are semi-crystalline and two T(g) were observed by differential scanning calorimetry when the molecular weight of the PHO block is about 20,000. |
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Keywords: | biodegradable diblock copolymers oligomers polyesters ring‐opening polymerization |
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