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Issue 22, 2018
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High-strain slide-ring shape-memory polycaprolactone-based polyurethane

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To enable shape-memory polymer networks to achieve recoverable high deformability with a simultaneous high shape-fixity ratio and shape-recovery ratio, novel semi-crystalline slide-ring shape-memory polycaprolactone-based polyurethane (SR-SMPCLU) with movable net-points constructed by a topologically interlocked slide-ring structure was designed and fabricated. The SR-SMPCLU not only exhibited good shape fixity, almost complete shape recovery, and a fast shape-recovery speed, it also showed an outstanding recoverable high-strain capacity with 95.83% Rr under a deformation strain of 1410% due to the pulley effect of the topological slide-ring structure. Furthermore, the SR-SMPCLU system maintained excellent shape-memory performance with increasing the training cycle numbers at 45% and even 280% deformation strain. The effects of the slide-ring cross-linker content, deformation strain, and successive shape-memory cycles on the shape-memory performance were investigated. A possible mechanism for the shape-memory effect of the SR-SMPCLU system is proposed.

Graphical abstract: High-strain slide-ring shape-memory polycaprolactone-based polyurethane

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Publication details

The article was received on 19 Mar 2018, accepted on 02 May 2018 and first published on 02 May 2018

Article type: Paper
DOI: 10.1039/C8SM00570B
Citation: Soft Matter, 2018,14, 4558-4568
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    High-strain slide-ring shape-memory polycaprolactone-based polyurethane

    R. Wu, J. Lai, Y. Pan, Z. Zheng and X. Ding, Soft Matter, 2018, 14, 4558
    DOI: 10.1039/C8SM00570B

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