화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.15, No.6, 553-559, October, 2007
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Synthesis and Characterization of Nanocomposite Films Consisting of Vanadium Oxide and Microphase-separated Graft Copolymer
Jin Kyu Choi, Yong Woo Kim, Joo Hwan Koh, Jong Hak Kim†, and Anne M. Mayes1
  • Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139-4307, USA
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Nanocomposite films were prepared by sol-gel synthesis from vanadium triisopropoxide with poly((oxyethylene)9 methacrylate)-graft-poly(dimethyl siloxane), POEM-g-PDMS, producing in situ growth of vanadium oxide within the continuous ion-conducting POEM domains of microphase-separated graft copolymer. The formation of vanadium oxide was confirmed by wide angle x-ray scattering (WAXS) and Fourier transform infrared (FT-IR) spectroscopy. Small angle x-ray scattering (SAXS) revealed the spatially-selective incorporation of vanadium oxide in the POEM domains. Upon the incorporation of vanadium oxide, the domain periodicity of the graft copoly- mer monotonously increased from 17.2 to 21.0 nm at a vanadium content 14 v%, above which it remained almost invariant. The selective interaction of vanadium oxide with POEM was further verified by differential scanning calorimetry (DSC) and FT-IR spectroscopy. The nanocomposite films exhibited excellent mechanical properties (10-5-10-7 dyne/cm2), mostly due to the confinement of vanadium oxide in the POEM chains as well as the interfaces created by the microphase separation of the graft copolymer.
Keywords:nanocomposite;sol-gel;graft copolymer;microphase separation;spectroscopy
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