| Summary: | 碩士 === 國立高雄師範大學 === 化學系 === 105 === The main object of this research is to synthesize G3POTA/HDDA/VTMS/TiO2 organic/inorganic with transparent,thermal resistance, abrasion resistance and UV-shielding and by sol-gel methods.Firstly,the VTMS coupling agent was performed the silanol intermediates by hydrolysis in pH2~3 acid solution to prove inorganic nano-filler TiO2 organic modified.The modified TiO2 could be coupled with VTMS to increase the level of network covalent with organic matrixes.and then G3POTA and HDDA acylate monomer mixed with VTMS/TiO2 complexes were chain polymerized by UV-activated polymerization to form ideally covalent network structure to improve the heat resistance and mechanical properties.
The chemical bonding formation and the best weight contents of reaction com-ponents were identified by Fourier-ttansform infrared spectrometer.The thermal re-sistance,optical transmittance, abrasion resistance,and hardness test of these nanocom-posites were measured by Thermogravimetric analyer,UV-visible absorption spectrom-eter,super megohmmeter,and pencil hardness tester respectively.The experimental results showed that these nanocomposites had more than 85% transmittance in visible regions and the Td value can reach 448.37℃.The surface resistance of nanocomposite is reduced to 4.37×109Ω/cm2 below 4.10wt% formula content of TiO2. The beat hardness of G3POTA/HDDA/VTMS/TiO2 was 9H,and those hybrid films have some UV-shielding properties.The morphology structures of the hybrid thin films are esti-mated by SEM. These result showed that the optical films were evenly distributed which meaned the TiO2 nanofiller and the VTMS coupling agent was excellent bondings and dispersion in organic matrixes and the average particle size of these nanocomposite was 55~65nm.
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