Synthesis of SR-444/Epoxy/ICS/ZnO Nanocomposites

Autor: Chen, Ya-Ling, 陳雅玲
Rok vydání: 2016
Druh dokumentu: 學位論文 ; thesis
Popis: 104
This research is to develop novel SR-444/Epoxy/ICS/ZnO organic/inorganic nanocomposites and their hybrid films with high thermal resistant, transparent and anti-static properties. Epoxy(Diglycidyl ether of bisphenol A), SR-444(Pentaerythritol triacrylate),ICS(tris[3-(trimethoxysilyl)propyl]isocyanurate), ZnO and PMDA(pyromellitic dianhydride) were used as organic monomer, monomer of hypercrosslinked copolymer, coupling agent, inorganic filler and curing reagent respectively. Firstly, ICS coupling agent was acid hydrolysis for 15 min to form its reactive silanol intermediate. These silanols could covalently bound some ZnO nanoparticles with their active Si-OH groups to get the ICS/ZnO complexes. Then the ICS-modified ZnO oxoclusters graft polymerized with active epoxide group of Epoxy monomer to form Epoxy/ICS/ZnO composites by ring-opening polycondensation. After mixed SR-444 monomer, the final SR-444/Epoxy/ICS/ZnO nanocomposites were prepared by UV-activated photopolymerization. Meanwhile, ICS could perform the uniformly dispersion of inorganic nanoparticles in the hybrid materials. Polyfunctionalized SR-444 and PMDA components strongly constructed the highly crosslinked structure in these nanocomposites and it could much enhance the thermal stability, abrasion resistance and optical properties. The chemical bonding formation and the best weight contents of reaction components are identified by FT-IR spectra. The thermal resistance, transparence, surface electric resistance, and hardness of these nanocomposites are measured by TGA, UV-Visible, surface resistant meter, and pencil hardness tester resprctively. Experimental results show that these nanocomposites have 85% transmittance and the best Td value is 463.36℃ which is 180.52℃ and 82.57℃ higher than those of pure Epoxy resin and Epoxy/ICS/ZnO hybrid material respectively. Key word：Nanocomposites、Thermal resistance、sol-gel、epoxy
Databáze: Networked Digital Library of Theses & Dissertations
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