Journal of Materials Science

, Volume 30, Issue 10, pp 2566–2570 | Cite as

Ormosil coatings of high hardness

  • T. Iwamoto
  • J. D. Mackenzie


Organically modified silicates (ormosils) of two systems were coated on polyethyleneterephthalate (PET) substrates. One was the tetraethoxysilane (TEOS)-vinyltriethoxysilane (VTES) system and the other was the TEOS-tetraisopropyltitanate (TIPT)-VTES system. The reactions among the alkoxides were examined by liquid state 29Si nuclear magnetic resonance (NMR) spectroscopy. The chemical bonds between TEOS and VTES, between TEOS and TIPT, and between VTES and TIPT are shown in the spectra and the reaction schemes are proposed. Vickers hardnesses of the ormosil coatings were obtained by using the models developed by Jönsson and Hogmark, and the theoretical models developed by the authors were valuable to predict the hardness values. The ormosil coatings obtained in the present study were much harder than the hardest transparent plastics, and thus are very useful for hard or protective coatings on organic polymers.


Silicate Nuclear Magnetic Resonance Liquid State High Hardness Alkoxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    G. Philipp and H. Schmidt, J. Non-Cryst. Solids 63 (1984) 283.CrossRefGoogle Scholar
  2. 2.
    G. L. Wilkes, B. Orler and H. Huang, Polym. Prepr. 26 (1985) 300.Google Scholar
  3. 3.
    J. J. Bikerman (Ed.), in “The Science of Adhesive Joints” (Academic Press, New York, 1968).Google Scholar
  4. 4.
    B. Jönsson and S. Hogmark, Thin Solid Films 114 (1984) 257.CrossRefGoogle Scholar
  5. 5.
    T. Iwamoto and J. D. Mackenzie, in “Better Ceramics Through Chemistry VI”, edited by A. K. Cheetham, C. J. Brinker, M. L. Mecartney and C. Sanchez (Elsevier, New York, 1994) p. 397.Google Scholar
  6. 6.
    Idem, J. Sol-Gel Sci. Technol. 4 (1995)Google Scholar
  7. 7.
    B. E. Yoldas, J. Non-Cryst. Solids 38 & 39 (1980) 81.CrossRefGoogle Scholar
  8. 8.
    G. C. Levy and J. D. Cargioli, in “Nuclear Magnetic Resonance Spectroscopy of Nuclei Other Than Protons”, edited by T. Axenrod and G. A. Webb (Wiley, New York, 1974) Ch. 17.Google Scholar
  9. 9.
    Y. Sugahara, Y. Tanaka, S. Saito, K. Kuroda and C. Kato, in “Better Ceramics Through Chemistry V”, edited by M. J. Hampden-Smith, W. G. Klemperer and C. J. Brinker (Elsevier, New York, 1992) p. 231.Google Scholar
  10. 10.
    K. L. Walther, A. Wokaun, B. E. Handy and A. Baiker, J. Non-Cryst. Solids 134 (1991) 47.CrossRefGoogle Scholar
  11. 11.
    H. Marsmann, in “NMR-17, Oxygen-17 and Silicon-29”, edited by P. Diehl, E. Fluck and R. Kosfeld (Springer, Berlin, 1981) p. 65.Google Scholar
  12. 12.
    A. K. Bhattacharya and W. D. Nix, Int. J. Solids Struct. 24 (1988) 1287.Google Scholar
  13. 13.
    M. Yamane and J. D. Mackenzie, J. Non-Cryst. Solids 15 (1974) 153.CrossRefGoogle Scholar
  14. 14.
    K. H. Sun, J. Amer. Ceram. Soc. 30 (1947) 277.Google Scholar
  15. 15.
    A. Makishima and J. D. Mackenzie, J. Non-Cryst. Solids 12 (1973) 35.CrossRefGoogle Scholar
  16. 16.
    C. J. Brinker and G. W. Scherer (Eds), in “Sol-Gel Science” (Academic Press, San Diego, 1990) p. 799.Google Scholar
  17. 17.
    H. Morikawa, T. Osuka, F. Marumo, A. Yasumori, M. Yamane and M. Momura, J. Non-Cryst. Solids 82 (1986) 97.CrossRefGoogle Scholar
  18. 18.
    M. Imaoka, H. Hasegawa, Y. Hamaguchi and Y. Kurotaki, Yogyo Kyokaishi 79 (1971) 164.Google Scholar
  19. 19.
    L. Ainworth, J. Soc. Glass Technol. 38 (1954) 501.Google Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • T. Iwamoto
    • 1
  • J. D. Mackenzie
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of CaliforniaLos AngelesUSA

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