Title: Preparation and Characterization of Epoxy/Polyhedral Oligomeric Silsesquioxane Hybrid Nanocomposites
Authors: Huang, Jieh-Ming
Huang, Hui-Ju
Wang, Yu-Xiang
Chen, Wen-Yi
Chang, Feng-Chih
Department of Applied Chemistry
Keywords: epoxy;nanocomposites;photopolymerization;POSS;thermal properties
Issue Date: 1-Oct-2009
Abstract: We have prepared epoxy/polyhedral oligomeric silsesquioxane (POSS) nanocomposites by photopolymerization from octakis(glycidylsiloxy)octasilsesquioxane (OG) and diglycidyl ether of bisphenol A. We used nuclear magnetic resonance, Raman, and Fourier transform infrared spectroscopies to characterize the chemical structure of the synthetic OG. Differential scanning calorimetry and dynamic mechanical analysis (DMA) revealed that the nanocomposites possessed higher glass transition temperatures than that of the pristine epoxy resin. Furthermore, DMA indicated that all of the nanocomposites exhibited enhanced storage moduli in the rubbery state, a phenomenon that we ascribe to both the nano-reinforcement effect of the POSS cages and the additional degree of crosslinking that resulted from the reactions between the epoxy and OG units. Thermogravimetric analysis revealed that the thermal stability of the nanocomposites was better than that of the pristine epoxy. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1927-1934, 2009
URI: http://dx.doi.org/10.1002/polb.21788
ISSN: 0887-6266
DOI: 10.1002/polb.21788
Volume: 47
Issue: 19
Begin Page: 1927
End Page: 1934
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