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Title Page
초록
Abstract
Contents
Chapter 1. Introduction 12
1.1. Bioplastics 12
1.2. Poly(ethylene terephthalate) (PET) 13
1.3. Furan-2,5-dicarboxylic acid (FDCA) 14
1.4. Furan-based polyester 17
1.5. Solid-state Polymerization (SSP) of polyester 19
1.5.1. Crystallization for SSP 20
1.5.2. Crystal annealing 22
Chapter 2. Synthesis and Characterization of Furan based copolyesters containing cyclohexane 24
2.1. Introduction 24
2.2. Experimental 25
2.2.1. Materials 25
2.2.2. Synthesis of co-polyesters 26
2.2.3. Analysis 27
2.3. Results and discussion 29
2.3.1. Syntheses 29
2.3.2. Characterizations 31
2.4. Conclusion 47
Chapter 3. Crystallization behavior and Solid-state Polymerization of Furan based copolyesters containing cyclohexane 48
3.1. Introduction 48
3.2. Experimental 50
3.2.1. Solid state polymerization 50
3.2.2. Analysis 51
3.3. Results and discussion 52
3.3.1. Crystallization for SSP 52
3.3.2. Solid-state polymerizations (SSP) 60
3.3.3. Characteristic of EC75 for the preparation of beverage packaging 65
3.4. Conclusion 70
Reference 71
Curriculum Vitae 76
Figure 1.1. The carbon dioxide cycle of fossil fuel-plastic and bio-plastic 12
Figure 1.2. Preparation and chemical structure of PET 13
Figure 1.3. Preparation of FDCA 15
Figure 1.4. Synthesis of Poly(ethylene 2,5-furanoate)(PEF) 17
Figure 1.5. Illustration of a spherulite growing into a melt 21
Figure 1.6. Schematic of a PET-SSP process, showing typical DSC thermograms... 23
Figure 2.1. Step-growth polycondensation of furan-based co-polyesters via melt... 27
Figure 2.2. ¹H NMR spectra of furan-based co-polyesters 32
Figure 2.3. DSC thermograms of furan-based co-polyesters 34
Figure 2.4. Thermogravimetric analysis of furan based co-polyesters 37
Figure 2.5. Tensile properties of furan-based co-polyesters 40
Figure 2.6. Fracture surface of furan based co-polyesters 43
Figure 2.7. Dynamic mechanical thermal analysis of furan based co-polyesters 45
Figure 3.1. Isothermal crystallization behaviors of furan-based co-polyesters... 53
Figure 3.2. Crystallization half-time of furan-based co-polyesters 54
Figure 3.3. Polarized optical microscopy (POM) images of furan-based co-polyesters 55
Figure 3.4. DSC thermograms of furan-based co-polyesters: annealed at various times... 57
Figure 3.5. Changes in △Hm of furan-based co-polyesters at various annealing times... 58
Figure 3.6. WAXS patterns of furan-based co-polyesters after annealing at 190℃... 59
Figure 3.7. Development of (a) IV vs. time (b) COOH vs. time during SSP 62
Figure 3.8. SAXS patterns of furan-based copolyesters after annealing at 190 ℃... 64
Figure 3.9. Morphological effects of lamellar stacks during an SSP reaction. 64
Figure 3.10. O₂ barrier properties of EC75 66
Figure 3.11. Thermal degradation of EC75 69
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