Research Article

Completely discontinuous organic/ inorganic hybrid nanocomposites by self-curing of nanobuilding blocks constructed from reactions of [HMe2SiOSiO1.5]8 with vinylcyclohexene

  1. Norihiro Takamura,
  2. Lisa Viculis,
  3. Chunxin Zhang,
  4. Richard M Laine*

Article first published online: 16 APR 2007

DOI: 10.1002/pi.2281

Issue

Polymer International

Polymer International

Volume 56, Issue 11, pages 1378–1391, November 2007

Additional Information

How to Cite

Takamura, N., Viculis, L., Zhang, C. and Laine, R. M. (2007), Completely discontinuous organic/ inorganic hybrid nanocomposites by self-curing of nanobuilding blocks constructed from reactions of [HMe2SiOSiO1.5]8 with vinylcyclohexene. Polymer International, 56: 1378–1391. doi: 10.1002/pi.2281

Author Information

  1. Departments of Materials Science and Engineering, Chemistry, and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109-2136, USA

*Departments of Materials Science and Engineering, Chemistry, and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109-2136, USA

Publication History

  1. Issue published online: 22 SEP 2007
  2. Article first published online: 16 APR 2007

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Keywords:

  • self-curing;
  • bifunctional;
  • silsesquioxanes;
  • oxidation resistance;
  • transparent

Abstract

The reaction of 4-vinyl-1-cylcohexene with [HMe2SiOSiO1.5]8 provides tetra- and octa-2-cyclohexenylethyloctasilsesquioxanes. The tetrabifunctional [cyclohexenylethylMe2SiOSiO1.5]4-[HMe2SiOSiO1.5]4 (average degree of functionalization) melts near 80 °C and can be cast and then cured (by thermal hydrosilylation) into transparent nanocomposite shapes. These materials, while not nanoporous, offer dielectric constants of 2.8–2.9 at 100 kHz to 3 MHz, and are air stable to temperatures ≥ 400 °C. The resulting materials appear (by X-ray diffraction) to be partially ordered after curing. The octafunctional material also melts at low temperatures (ca 120 °C) and can be copolymerized with hydridosiloxanes to give similar materials with lower thermal stability. The synthesis and characterization of the starting materials is described, as well as thermal curing studies and properties characterization of the resultant nanocomposites. Copyright © 2007 Society of Chemical Industry

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