Abstract
The preparation of oligosilsesquioxanes from methyltrimethoxysilane and cyclohexyltrimethoxysilane for use as organic–inorganic fillers is reported. These oligomers were characterized by molecular weight, nuclear magnetic resonance analyses, and Fourier-transform infrared spectroscopy. The poly(methyl methacrylate) nanocomposites containing oligosilsesquioxanes were prepared by two methods: (i) the solution blending method and (ii) the solution–melt blending method. The solution–melt blending method was found to be a superior method for improving the thermal and mechanical properties of PMMA by intermolecular interaction between oligosilsesquioxanes fillers and PMMA.
Highlights
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Preparation of oligosilsesquioxanes via hydrolysis–condensation reaction of alkylalkoxysilanes.
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Characterization of oligosilsesquioxanes by nuclear magnetic resonance analyses and Fourier-transform infrared spectroscopy.
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Difference of poly(methyl methacrylate) composites containing oligosilsesquioxanes by preparation methods.
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PMMA composite by solution-melt-blending method showed improved properties.
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Acknowledgements
This work was supported by JSPS KAKENHI Grant Numbers JP19K05636 and JP18K14287. Dr Kazuhiro Sayama (AIST) is greatly acknowledged for the AFM instrumentation. Prof. Yuichi Negishi and Ms Yukari Imai (Tokyo University of Sci.) are acknowledged for the assistance with MALDI-TOF-MS analysis.
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Sato, Y., Hayami, R., Miyase, Y. et al. Preparation and properties of methyl- and cyclohexylsilsesquioxane oligomers as organic–inorganic fillers. J Sol-Gel Sci Technol 95, 474–481 (2020). https://doi.org/10.1007/s10971-020-05291-2
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DOI: https://doi.org/10.1007/s10971-020-05291-2