Synthesis of silane-grafted graphene oxide (sg-GO) and silane-grafted thermally reduced graphene oxide (sg-TRGO), and their effects on the volume shrinkage, mechanical properties, cured sample morphology, and X-ray scattering characteristics for vinyl ester resins
| Autor: | Yi-cheng Liao, 廖翊成 |
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| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 The effects of graphene oxide (GO), silane-grafted graphene oxide (sg-GO), thermally reduced graphene oxide (TRGO), and silane-grafted thermally reduced graphene oxide (sg-TRGO) as special addictive on the cured sample morphologies, volume shrinkage characteristics and mechanical properties for low-shrink vinyl ester resins (VER) cured at 120 oC were investigated. The TRGO was produced by placing the GO in a high-temperature furnace kept at 1050 oC for 30 s, which was synthesized from natural graphites with average particle size of 75 μm by a modified Hummers method. The sg-GO was synthesized by using the silane coupling agent bearing acrylic C=C bonds, namely, γ-methacryloxy propyl trimethoxy silane (MPS), as a surface modifier for the surface treatment of GO at 100oC for 3 hr with different times of reaction for surface treatment between GO and MPS (n=1 or 3), and with a fixed weight ratio of GO/MPS/solvent at 1:5:94. The grafting density of MPS on the GO or TRGO has been measured by FTIR. Finally, the effects of additives synthesized, such as, GO, sg-GO, TRGO, and sg-TRGO, on the volume shrinkage and mechanical properties for the styrene(St)/vinyl ester resin(VER)/additive ternary systems after the cure have also been investigated. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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