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Synthesis and characterization of fillers of controlled structure based on polyhedral oligomeric silsesquioxane cages and their use in reinforcing siloxane elastomers |
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| Authors: | Guirong Pan James E Mark Dale W Schaefer |
| Institution: | 1. Polymer Research Center, University of Cincinnati, Cincinnati, Ohio, 45221
Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, Ohio, 45221-0012;2. Polymer Research Center, University of Cincinnati, Cincinnati, Ohio, 45221 Department of Chemistry, University of Cincinnati, Cincinnati, Ohio, 45221;3. Polymer Research Center, University of Cincinnati, Cincinnati, Ohio, 45221 |
| Abstract: | Four polyhedral oligomeric silsesquioxane (POSS) cages with vinyl groups were linked to a central siloxane core by hydrosilylation. The goal was to obtain filler particles of sizes between those of the POSS cages themselves and the much larger silica particles typically used to reinforce elastomers. The hydrosilylation reaction was monitored with Fourier transform infrared spectroscopy and proton nuclear magnetic resonance, and the resulting structure was confirmed by mass spectrometry. Simply blending these POSS-based fillers into silanol-terminated poly(dimethylsiloxane) (PDMS) had little effect on the mechanical properties, but bonding them to PDMS provided considerable reinforcement. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 3314–3323, 2003 |
| Keywords: | polyhedral oligomeric silsesquioxane (POSS) MALDI mass spectrometry siloxane elastomers nanocomposites mechanical properties reinforcement |