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A Metallosupramolecular Shape‐Memory Polymer with Gradient Thermal Plasticity
Author(s) -
Yang Lipeng,
Zhang Guogao,
Zheng Ning,
Zhao Qian,
Xie Tao
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201706949
Subject(s) - plasticity , materials science , supramolecular chemistry , polymer , covalent bond , nanotechnology , shape memory polymer , morphing , solid state , chemical physics , computer science , molecule , chemistry , composite material , engineering physics , physics , organic chemistry , computer vision
Solid‐state plasticity by dynamic covalent bond exchange in a shape‐memory polymer network bestows a permanent shape reconfiguration ability. Spatio‐selective control of thermally induced plasticity may further extend the capabilities of materials into unexplored domains. However, this is difficult to achieve because of the lack of spatio‐control in typical polymer network synthesis. Metal–ligand interactions possess the high strength of covalent bonds while maintaining the dynamic reversibility of supramolecular bonds. Metallosupramolecular shape‐memory polymer networks were designed and prepared, which demonstrated solid‐state plasticity. The metallo‐coordination bonds within these networks permit facile tuning of the plasticity behavior across a wide temperature range, simply by changing the metal ion. By controlling the diffusion of two different metal ions during preparation of a polymer film, a plasticity behavior with a spatial gradient was achieved, providing a unique shape‐morphing versatility with potential in shape‐memory devices.