Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. Philipp and H. Schmidt, J. Non-Cryst. Solids 63 (1984) 283.
G. L. Wilkes, B. Orler and H. Huang, Polym. Prepr. 26 (1985) 300.
J. J. Bikerman (Ed.), in “The Science of Adhesive Joints” (Academic Press, New York, 1968).
B. Jönsson and S. Hogmark, Thin Solid Films 114 (1984) 257.
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.
Idem, J. Sol-Gel Sci. Technol. 4 (1995)
B. E. Yoldas, J. Non-Cryst. Solids 38 & 39 (1980) 81.
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.
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.
K. L. Walther, A. Wokaun, B. E. Handy and A. Baiker, J. Non-Cryst. Solids 134 (1991) 47.
H. Marsmann, in “NMR-17, Oxygen-17 and Silicon-29”, edited by P. Diehl, E. Fluck and R. Kosfeld (Springer, Berlin, 1981) p. 65.
A. K. Bhattacharya and W. D. Nix, Int. J. Solids Struct. 24 (1988) 1287.
M. Yamane and J. D. Mackenzie, J. Non-Cryst. Solids 15 (1974) 153.
K. H. Sun, J. Amer. Ceram. Soc. 30 (1947) 277.
A. Makishima and J. D. Mackenzie, J. Non-Cryst. Solids 12 (1973) 35.
C. J. Brinker and G. W. Scherer (Eds), in “Sol-Gel Science” (Academic Press, San Diego, 1990) p. 799.
H. Morikawa, T. Osuka, F. Marumo, A. Yasumori, M. Yamane and M. Momura, J. Non-Cryst. Solids 82 (1986) 97.
M. Imaoka, H. Hasegawa, Y. Hamaguchi and Y. Kurotaki, Yogyo Kyokaishi 79 (1971) 164.
L. Ainworth, J. Soc. Glass Technol. 38 (1954) 501.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Iwamoto, T., Mackenzie, J.D. Ormosil coatings of high hardness. J Mater Sci 30, 2566–2570 (1995). https://doi.org/10.1007/BF00362135
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00362135