Preparation and physical properties of poly(ethylene terephthalate)/ clay flexible substrate
| Autor: | Hsieh Chih Chen, 陳協志 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 Plastic substrates themselves belong to organic polymer, so they are likely to face such problems as moisture and oxygen permeation. This will cause the physical properties of the liquid crystal or other structure in displays to deteriorate, decreasing life spans and qualities. Thus it is necessary to coat with barriers hindering the atmosphere entering substrates. The main purposes of the research are to add modified montmorillonite which has larger interlayer spacing equal to 33.5 Å as the dispersed phase to prepare PET/clay nanocomposites, and to control the thickness of the substrate about 100μm. In order to reduce moisture permeability into flexible substrates, and to raise adhesion between the PET/clay substrate and the multilayer barriers by using plasma to perform PET/clay surface roughness controlling the flow rate of N2 / O2, treating time, and different RF Power and substrate heating temperature in the period of the experiment. After that, an organic-inorganic material (PMMA/ SiO2) is employed as barriers by sol-gel method controlling the thickness of the thin films about 10μm. Using XRD, TGA, DSC, SPM, FTIR, FESEM and SEM, respectively, to analyze material properties and evaluating the effects of barriers with MOCON. The results of the research indicate that adding a trace of clay helps improving the property of gas impediment. Moreover, PET/clay surface roughness could postpone moisture permeation into flexible substrates. And coating PMMA/SiO2 barriers can contribute to ideal result of moisture hindered, hence much lower moisture permeability into flexible substrates. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|