Preparation and characterization of epoxy/polyhedral oligomeric silsesquioxane hybrid nanocomposites |
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| Authors: | Jieh‐Ming Huang Hui‐Ju Huang Yu‐Xiang Wang Wen‐Yi Chen Feng‐Chih Chang |
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| Institution: | 1. Department of Chemical and Materials Engineering, Vanung University, 1, Van Nung Road, Chung‐Li, 32054, Taiwan, Republic of China;2. Institute of Applied Chemistry, National Chiao‐Tung University, Hsin‐Chu, Taiwan, Republic of China |
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| 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. © 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1927–1934, 2009 |
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| Keywords: | epoxy nanocomposites photopolymerization POSS thermal properties |
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