NDLI: Nanoindentation testing of SiO$_{2}$-PMMA hybrid films on acrylic substrates with variable coupling agent content

Content Provider	Springer Nature Link
Author	Alvarado Rivera, J. Muñoz Saldaña, J. Ramírez Bon, R.
Copyright Year	2010
Abstract	In this work we report the influence of the molar composition of the coupling agent, as well as the curing conditions on the mechanical properties of SiO$_{2}$-PMMA (polymethyl methacrylate) hybrid films deposited on organic acrylic substrates. The SiO$_{2}$-PMMA hybrid films were deposited by the sol–gel method from hybrid precursor solutions with fixed molar ratio of 1:0.25 for TEOS/MMA (Tetraethyl-orthosilicate/Methylmethacrylate) and TEOS/TMSPM (3-trimethoxysilyl propyl methacrylate) molar ratios ranging from 1:0.05 to 1:0.2. The organic compound TMSPM was used as coupling agent to enhance the bond between the organic and inorganic molecules. The wear resistance, hardness and elastic modulus of the hybrid films were determined by nanoindentation techniques and compared to the substrate mechanical behaviour. The chemical bonding in the hybrid films was analyzed by Fourier Transform Infrared spectroscopy and their transparency by optical transmission and reflection spectroscopy. The friction coefficient and sliding life of the hybrid films were also measured with a pin-on-disc tribometer. The surface morphology and roughness were determined from atomic force microscopy images. The hybrid films with lowest content of coupling agent showed the best mechanical performance in terms of hardness, friction coefficient and wear resistance keeping high optical transparency.
Starting Page	312
Ending Page	318
Page Count	7
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	54
Issue Number	3
e-ISSN	15734846
Language	English
Publisher	Springer US
Publisher Date	2010-04-06
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hybrid coatings Sol–gel Nano-indentation Nanoscratching Pin on disc Sliding life Nanotechnology Optical and Electronic Materials Inorganic Chemistry Ceramics, Glass, Composites, Natural Methods
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials

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