| Summary: | 碩士 === 國立高雄師範大學 === 化學系 === 104 === This research is to develop di-TMPTA/Epoxy/VTMS/ZnO nanocomposite materials with high heat resistance, good transmittance, UV-shielding and anti-static properties. Firstly, the VTMS performs the silanol intermediates by hydrolysis in pH2~3 acid solution. The inorganic anti-static fillers of powder ZnO can be successfully coupled and crosslinked to di-TMPTA/Epoxy organic matrixes with these silanols of VTMS coupling agents. The remained active -OH functional groups of the VTMS/ZnO complexes can network bonding with epoxy prepolymers. Therefore, the Epoxy/VTMS/ZnO complexes with good anti-static composites will be successfully prepared. Finally, in order to improve the thermal resistant and mechanical properties, the di-TMPTA acrylate monomers and the Epoxy/VTMS/ZnO composites are chain polymerized by free radical polymerization to form a perfectly cross-linking structure of orgaic/inorganic nanocomposites.
The chemical bonding formation and the best weight contents of reaction components are identified by FT-IR spectra. The thermal resistance, transmittance, surface resistane, and hardness of these nanocomposites are measured by TGA, photo-UV, surface resistant meter and hardness tester respectively. Experimental results show that these nanocomposites have 90% transmittance and the best Td value is 421.6℃ which is 141.3℃ higher than those of pure epoxy resin. The glass transition temperature is not detected below 200℃. The surface resistanes of di-TMPTA/Epoxy/VTMS/ZnO hybrid thin films are decreased from 3.56×1012Ω/ cm2 to 3.23×107 Ω/ cm2. The hardness of these nanocomposites is 8H, and those hybrid films have some UV-shielding properties. The morphology structures of the hybrid thin films are estimated by SEM. The results show that the optical thin films are evenly distributed with inorganic colloidal particles and the average particle size of these nanocomposites is 30~65 nm.
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