Biodegradable Stereocomplex polylactide having flexible ε-caprolactone unit
- Biodegradable Stereocomplex polylactide having flexible ε-caprolactone unit
- 강민규; 정영미; 김수현
- stereocomplex formation; copolymerization; supercritical fluid
- Issue Date
- Macromolecular research
- VOL 21, NO 9, 1036-1041
- Stereocomplex formation between poly(L-lactide-co-ε-caprolactone) (PLLCL) and poly(D-lactide-co-ε-
caprolactone) (PDLCL) is known to be disturbed when their molecular weights increase to >105 g/mol. Here, Strong
and biodegradable stereocomplexes of copolymers (S-PLCL) were studied using a supercritical fluid and co-solvent
system. Mechanical properties such as tensile strength were ~2.5 times increased due to high degree of stereocomplex than
those of PLGA20. The addition of the flexible ε-caprolactone units to the polylactide increased its thermal stability
which significantly enhanced 100% degree of stereocomplex after 2nd melt processing through DSC due to the
increased mobillity of the polylactide’s chains. The degradation behavior of resulting biodegradable S-PLCL
showed slow degradation with increasing CL content in 0.13 M, pH 4.3 phosphate buffers.
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