Waterborne polyurethane nanocomposites having shape memory effects |
| |
| Authors: | Soo Kyung Lee Sung Ho Yoon Ildoo Chung Andreas Hartwig Byung Kyu Kim |
| |
| Affiliation: | 1. Department of Polymer Science and Engineering, Pusan National University, Busan 609‐735, Korea;2. Fraunhofer‐Institute for Manufacturing Technology and Applied Materials Research, Adhesive Bonding Technology and Surfaces, Wiener Strasse 12, Bremen D‐28359, Germany |
| |
| Abstract: | UV curable waterborne polyurethane/silica nanocomposites were designed and synthesized with functionalized silicas, where the functionalization was made with allyl isocyanate. The incorporated silica particles gave triple effects of multifunctional chemical cross‐links, reinforcing fillers, and stress relaxation retarders. Consequently, functionalized silica incorporated into the polymer chains showed significantly improved mechanical and thermal properties than the simple addition of unmodified silica. Notably, over 99% shape fixity and shape recovery with minimum cyclic hysteresis were obtained for the repeated cycles at 1% loading of the modified silica. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 |
| |
| Keywords: | composite dispersion polyurethane shape memory silica modification UV cure |
|
|
