The effect of polyhedral oligosilsesquioxanes (POSS) on cavitation resistance of hybrid acrylate films
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Tomić, Nataša Z.
Vuksanović, Marija M.
Pavlović, Vladimir B.
Marinković, Aleksandar D.
Article (Published version)
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Cavitation erosion of hybrid acrylate composite films with polyhedral oligosilsesquioxanes (POSS) was investigated in this study. The hybrid films are made with 1, 3 and 5 wt% of POSS reagents containing: (a) hydroxyl (POSS-M), (b) both hydroxyl and allyl (POSS-M-A) and (c) methacryloyl groups (POSS-MCl). Addition of 5 wt% POSS-M-A caused the highest microhardness increase for 49.8%, in comparison to the pure matrix material. Cavitation resistance of hybrid films, estimated as the time-dependent mass loss, was improved by POSS addition. POSS-M-A addition (5 wt%) contributed to 94% lower mass loss comparing to pure Bis-GMA/TEGDMA film. Scanning electron (SEM) and atomic force microscopy (AFM) showed the lowest surface roughness obtained for composite with POSS-M-A. The improved hardness and wear resistance of the composite films indicated that POSS-M-A filler enhanced interfacial adhesion and reinforcing of the Bis-GMA/TEGDMA matrix.
Keywords:cavitation erosion / coatings / crosslinking / microscopy / surfaces
Source:Polymer Composites, 2020, 1-8
- John Wiley and Sons Inc