期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 49, 期 3, 页码 634-641出版社
WILEY
DOI: 10.1002/pola.24473
关键词
composite; dispersion; polyurethane; shape memory; silica modification; UV cure
资金
- National Research Foundation of Korea
- National Research Foundation of Korea [2010-0008277] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 634-641, 2011
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