Controlling the switching temperature of biodegradable shape memory polymers composed of stereocomplex polylactide / poly(D,L-lactide-co-ε-caprolactone) blends

Kenta Hashimoto, Naruki Kurokawa, Atsushi Hotta

研究成果: Article査読

抄録

We synthesized new biodegradable shape-memory polymers (SMPs) by blending synthesized poly(D,L-lactide-co-ε-caprolactone) (PLCL) and stereocomplex polylactide (sc-PLA) to be used as biomaterials for medical devices. PLCL copolymers (Mn ∼80,000) with various monomer ratios (LA:CL) were synthesized by the bulk ring-opening polymerization. The glass transition temperature of the resulting PLCL copolymers could be well controlled from −3 °C to 60 °C, agreeing well with the values by the Gordon-Taylor equation, confirming the homogeneous random distribution of LA and CL monomers in the synthesized PLCL. The synthesized PLCL and sc-PLA were eventually blended for the fabrication of biodegradable SMPS. The PLCL/sc-PLA blend samples possessed the sc-PLA crystallinity of ∼13%, which effectively worked as crosslinkings, exhibiting shape-memory behavior with various switching temperatures (30.5°C–62 °C) and shape-recovery ratios realized by adjusting the CL ratio of the PLCL copolymers: a lower CL ratio resulted in a higher switching temperature and a higher shape-recovery ratio.

本文言語English
論文番号124190
ジャーナルPolymer
233
DOI
出版ステータスPublished - 2021 10 26

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 材料化学

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