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Issue 30, 2011
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Organic–inorganic nanocomposite bilayers with triple shape memory effect

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Abstract

Various amounts of silica nanoparticles were chemically incorporated into amorphous polyurethanes (PU) of two different molecular weights by sol–gel reactions, and the effects were studied in terms of mechanical, dynamic mechanical, dual, and triple shape memory effects (DSME and TSME) of the nanocomposite films. It was found that the silica particles act as multifunctional cross-links as well as reinforcing fillers and significantly augmented the glassy and rubbery state moduli, yield strength, break strength, glass transition temperature, and dual shape memory properties. A cohesive bilayer of the two films fabricated from an interpenetrating polymer network (IPN) exhibited synergistic mechanical properties in the glassy and rubbery states along with two undisturbed glass transitions by which an intermediate plateau region and TSME were demonstrated.

Graphical abstract: Organic–inorganic nanocomposite bilayers with triple shape memory effect

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Publication details

The article was received on 17 Feb 2011, accepted on 09 May 2011 and first published on 29 Jun 2011


Article type: Paper
DOI: 10.1039/C1JM10722D
J. Mater. Chem., 2011,21, 11288-11295

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    Organic–inorganic nanocomposite bilayers with triple shape memory effect

    C. Y. Bae, J. H. Park, E. Y. Kim, Y. S. Kang and B. K. Kim, J. Mater. Chem., 2011, 21, 11288
    DOI: 10.1039/C1JM10722D

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