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Article Dans Une Revue Polymer Degradation and Stability Année : 2007

Enzymatic degradation of block copolymers obtained by sequential ring opening polymerization of L-lactide and e-caprolactone

Résumé

Triblock copolymers of e-caprolactone and L-lactide with different molar ratios were prepared via sequential ring opening polymerization (ROP) of both monomers. The resulting PCL-PLLA-PCL block copolymers were characterized by using NMR, SEC, DSC and XRD. The triblock copolymers exhibited only one melting peak corresponding to the PCL block. Enzyme-catalyzed biodegradation of solution cast films was investigated at 37 oC in the presence of proteinase K or pseudomonas lipase. It was observed that in the PCL-PLLA-PCL block copolymers, the PLLA component retarded the degradation of the block copolymer. The degradation of PCL-PLLA-PCL films by pseudomonas lipase seems to proceed according to surface erosion mechanism. From 1HNMR studies, there were no significant changes in their chemical compositions.

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Dates et versions

hal-00417336 , version 1 (15-09-2009)

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Citer

Suming Li. Enzymatic degradation of block copolymers obtained by sequential ring opening polymerization of L-lactide and e-caprolactone. Polymer Degradation and Stability, 2007, 92, pp.1769-1777. ⟨10.1016/j.polymdegradstab.2007.07.012⟩. ⟨hal-00417336⟩
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