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Issue 43, 2016
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Thermo- and water-induced shape memory poly(vinyl alcohol) supramolecular networks crosslinked by self-complementary quadruple hydrogen bonding

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Abstract

Poly(vinyl alcohol) (PVA) supramolecular networks cross-linked by ureido-pyrimidinone (UPy) dimers via strong quadruple hydrogen bonding in donor–donor–acceptor–acceptor (DDAA) arrays have been synthesized for the first time. This material displays excellent thermo- and water-induced shape memory behavior with a recovery ratio of nearly 99%. These UPys are dimerized as DDAA arrays, which present good stability in both water and alkaline solutions (pH 12), or at temperatures below 120 °C. UPy dimers act as a fixed phase to hold the material's permanent shape, whereas the PVA chains act as a reversible phase to control the temporary shape. This physical cross-linking, formed by UPy dimerization, can potentially replace traditional chemical cross-linking with covalent bonds, thereby providing a more simple and practical strategy to obtain multi-responsive shape memory polymers.

Graphical abstract: Thermo- and water-induced shape memory poly(vinyl alcohol) supramolecular networks crosslinked by self-complementary quadruple hydrogen bonding

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Publication details

The article was received on 26 Jul 2016, accepted on 09 Oct 2016 and first published on 10 Oct 2016


Article type: Paper
DOI: 10.1039/C6PY01302C
Citation: Polym. Chem., 2016,7, 6637-6644
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    Thermo- and water-induced shape memory poly(vinyl alcohol) supramolecular networks crosslinked by self-complementary quadruple hydrogen bonding

    H. Chen, Y. Li, G. Tao, L. Wang and S. Zhou, Polym. Chem., 2016, 7, 6637
    DOI: 10.1039/C6PY01302C

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