Synthesis and properties of block copolymers of enantiomeric polylactide and biopolyester
발표자
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초록
내용
To develop carbon dioxide-reducible polymeric materials, triblock copolymers (PLA-polyester-PLA) of enantiomeric lactides and biopolyester diol, were synthesized by the ring-opening polymerization of lactide in the presence of diol using stannous octoate. The results showed that the incorporation of the biopolyester decreases the crystallinity and melting temperature of PLA. However, the blend of enantiomeric PLA copolymers revealed more thermal stability than homo- and copolymers. It was due to the formation of stereocomplexes between enantiomeric PLAs. The topographic images of degradation showed that the degradation rate of a copolymer was faster than of PLA while that of stereocomplex became much slower.