Organic–inorganic hybrids containing polyimide,organically modified clay and in situ formed polydimethylsiloxane |
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| Affiliation: | 1. Graduate School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan;2. The University of Tokyo, Department of Materials Engineering, Bld. #4, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;3. Saitama Institute of Technology, Department of Applied Chemistry, 1690 Fusaiji, Fukaya, Saitama, 369-0293 Japan;1. Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, H3A 0C5, Canada;2. Department of Mechanical and Materials Engineering, Western University, London, Ontario, N6A 5B9, Canada;1. Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Trieste 34127, Italy;2. Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari di Venezia, Venezia 30123, Italy;1. Materials Science & Engineering Department, University of Ioannina, Ioannina, 45110, Greece;2. Department of Aeronautics, Imperial College London, South Kensington Campus, Exhibition Road, SW7 2AZ, London, UK;3. Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Agia Paraskevi, 15341, Greece;1. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China;2. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, China;3. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China;4. Faculty of Electrical and Computer Science, Ningbo University, Ningbo, 315211, China |
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| Abstract: | A series of organic–inorganic hybrid consisting of polyimide (PI) prepared from pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA), organically modified montmorillonite (OMMT) and polydimethylsiloxane (PDMS) were successfully prepared by in situ sol–gel process. OMMT was prepared by surface treatment of montmorillonite (MMT) with hexadecyltrimethylammonium bromide. X-ray diffraction (XRD) analysis showed that the OMMT layers were exfoliated into the polymer matrix at 2% of OMMT content. The PI–OMMT–PDMS hybrids at 2% of OMMT content were transparent when PDMS content was less than 5%. The PI–OMMT–PDMS hybrid showed better tensile modulus, strength and elongation at break than that of pristine PI due to the reinforcement effect of OMMT and toughening effect of PDMS. The thermal stability of hybrids such as the decomposition temperature and weight residue at 800 °C also increased with the increase of PDMS content as evidenced by thermogravimetric analysis (TGA). |
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