Issue 8, 2009
From the journal:

Journal of Materials Chemistry

Shape memory polyurethanes cross-linked by surface modified silica particles

Moon Kyoung Jang,a   Andreas Hartwigb  and  Byung Kyu Kim*a  

* Corresponding authors

a Dept. of Polymer Science and Engineering, Pusan National University, Busan 609–735, Korea
E-mail: bkkim@pnu.edu
Fax: +82 51 514 1726
Tel: +82 51 510 2406

b Fraunhofer-Institute for Applied Materials Research and Production Technology Adhesive Bonding and Surfaces, Wiener Strasse 12, Bremen, Germany

Abstract

Thermoresponsive polyurethane (PU)–silica nanocomposites were synthesized by incorporating silica particles as multifunctional cross-linkers into the PUvia sol–gel reactions. At 2 wt% silica, the composites showed over 99% shape fixity and shape recovery up to the 4th thermomechanical cycle along with outstanding mechanical properties in their rubbery as well as glass state. The incorporated nano-sized silica particles gave dual effects of multifunctional chemical cross-links and reinforcing fillers. The properties were favorably compared with those of uncross-linked PU and conventionally cross-linked PU.

Graphical abstract: Shape memory polyurethanes cross-linked by surface modified silica particles

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Article information

DOI
https://doi.org/10.1039/B816691A
Article type
Paper
Submitted
23 Sep 2008
Accepted
25 Nov 2008
First published
22 Jan 2009

J. Mater. Chem., 2009,19, 1166-1172

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Shape memory polyurethanes cross-linked by surface modified silica particles

M. K. Jang, A. Hartwig and B. K. Kim, J. Mater. Chem., 2009, 19, 1166 DOI: 10.1039/B816691A

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