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Biomacromolecules. 2007 Apr;8(4):1131-7. Epub 2007 Mar 20.

In situ copolyesters containing poly(L-lactide) and poly(hydroxyalkanoate) units.

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  • 1Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, USA.


In situ copolyesters containing polylactide (PLA) and polyhydroxyalkanoate (PHA) segments were obtained via ring-opening polymerization of L-lactide using PHA as a macroinitiator with stannous octoate as catalyst. Incorporation of PHA (20 wt %) into PLA affords a novel copolymer with Mn values ranging from 25 to 50 KDa and low polydispersities of 1.8-2.3. DSC analysis of the copolymer indicates well-defined crystallization and melting transitions different from the homopolymers and corresponding blend. The polymers were characterized by FT-IR, GPC, DSC, optical microscopy, NMR, and TGA. The results show successful reactivity of PHA as a macroinitiator for the ring-opening polymerization of lactide.

[PubMed - indexed for MEDLINE]
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