Abstract
Three coating families were synthesized by silsesquioxanes (SSO) derived from the hydrolytic condensation of (3-glycidoxypropyl) trimethoxysilane (GPMS), (3-methacrylpropyl) trimethoxysilane (MPMS) and vinyltrimethoxysilane (VMS), modified with 5wt%-30wt% tetraethoxysilanes (TEOS). Coatings on glass substrates were obtained by dip-coating solutions of SSO with ethylenediamine (EDA) and benzoyl peroxide (BPO) additions, and curing in an oven following a thermal cycle up to 120°C. Instrumented-indentation testing (IIT) provided with a continuous stiffness measurement (CSM) technique, was employed to study the nanomechanical properties of organic-inorganic hybrid coatings. The influence of different TEOS contents on the hardness, modulus and brittle index of the coatings was discussed. The coatings based on MPMS and 20 wt% TEOS exhibited a good combination of intrinsic values of hardness (0.51 GPa) and brittle index (0.056).
| Original language | English |
|---|---|
| Pages (from-to) | 463-466 |
| Number of pages | 4 |
| Journal | Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology |
| Volume | 37 |
| Issue number | 4 |
| State | Published - Apr 2005 |
Keywords
- Nanoindentation
- Nanomechanical
- Organic-inorganic hybrid films
- Silsesquioxanes
- Tetraethoxysilane
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