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- W2325819795 abstract "Novel multiblock polyesterurethanes containing crystalline hard and amorphous soft segments and pendant cinnamamide moieties were designed and synthesized via a two-step polyaddition reaction using N,N-bis(2-hydroxyethyl) cinnamamide (BHECA), biodegradable poly(l,l-lactide) (PLLA), and poly(ε-caprolactone) (PCL) diols as raw materials and hexamethylene diisocyanate (HDI) as coupling agent and characterized by 1H NMR, FTIR, UV, DSC, tensile and photomechanical tests, and so on. The copolymers behaved as typical thermoplastic elastomers and showed satisfactory thermal and mechanical properties. They also exhibited light-induced shape memory effect (LSME) at room temperature on exposure to light stimuli. The pendant cinnamamide groups work as photoresponsive molecular switches and provide the polymer with LSME via reversible [2 + 2] cycloaddition cross-linking. The strain fixity (Rf) increases with the content of BHECA and the strain recovery (Rr) increases with the content of PLLA. The Rf reaches 50% at a BHECA content of 20 wt % and the Rr reaches >95% at PLLA content of 50 wt %." @default.
- W2325819795 created "2016-06-24" @default.
- W2325819795 creator A5010781173 @default.
- W2325819795 creator A5062980621 @default.
- W2325819795 creator A5080536628 @default.
- W2325819795 date "2010-12-02" @default.
- W2325819795 modified "2023-10-14" @default.
- W2325819795 title "Synthesis, Properties, and Light-Induced Shape Memory Effect of Multiblock Polyesterurethanes Containing Biodegradable Segments and Pendant Cinnamamide Groups" @default.
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- W2325819795 doi "https://doi.org/10.1021/bm1012162" @default.
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