Synthesis and Properties of Stereoblock Copolymers Composed of Lactide and ε-Caprolactone

Synthesis and Properties of Stereoblock Copolymers Composed of Lactide and ε-Caprolactone

Sequential copolymerization of l -lactide (LLA) with ε-caprolactone (CL) followed by that of d -lactide (DLA) with CL was carried out to synthesize Poly(LLA-r-CL)-b-Poly(DLA-r-CL). The obtained Poly(LLA-r-CL)-b-Poly(DLA-r-CL) showed only one Tm ca. 30°C higher than that of Poly(LLA-r-CL), indicating...

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Veröffentlicht in:KOBUNSHI RONBUNSHU 2019/01/25, Vol.76(1), pp.61-67
Hauptverfasser: NAKAYAMA, Yuushou, UNO, Tomohito, SHIONO, Takeshi, SHIRAHAMA, Hiroyuki
Format: Artikel
Sprache:jpn
Schlagworte:
Biodegradation
Block Copolymerization
Chemical synthesis
Copolymerization
D- and L-Lactide
Elongation
Proteinase
Stereocomplex
ε-Caprolactone
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Zusammenfassung:Sequential copolymerization of l -lactide (LLA) with ε-caprolactone (CL) followed by that of d -lactide (DLA) with CL was carried out to synthesize Poly(LLA-r-CL)-b-Poly(DLA-r-CL). The obtained Poly(LLA-r-CL)-b-Poly(DLA-r-CL) showed only one Tm ca. 30°C higher than that of Poly(LLA-r-CL), indicating selective formation of stereocomplex crystals. The stereoblock Poly(LLA-r-CL)-b-Poly(DLA-r-CL) exhibited high elongation at break similarly to homochiral Poly(LLA-r-CL). Their biodegradation test using proteinase K showed lower degradability than that of homochiral Poly(LLA-r-CL).
ISSN:0386-2186
1881-5685
DOI:10.1295/koron.2018-0044