Title Page
Contents
ABSTRACT 10
Chapter 1. Introduction 11
1.1. Introduction of bio-based epoxy resin 11
1.2. Introduction of chemically decomposable epoxy resin 13
Chapter 2. Synthesis of novel epoxy resin with cleavable oxime ester 14
2.1. Motivation 14
2.2. Materials 14
2.3. Experimental methods 15
2.3.1. Synthesis and characterization of chemical degradable oxime epoxy 15
2.3.2. Instruments and Characterization Method 15
2.4. Characterization of BOE 17
2.5. Curing behavior analysis of BOE/HMDA 21
2.6. Mechanical and thermal properties of the cured epoxy resin 24
2.7. Characterization of chemically degraded BOE/HMDA 26
2.8. Summary 29
Chapter 3. Chemically Decomposable Silyl-ether Bio-based Epoxy 30
3.1. Motivation 30
3.2. Materials 30
3.3. Experimental methods 31
3.3.1. Synthesis and characterization of eugenol precursor (ES) 31
3.3.2. Synthesis and characterization of eugenol epoxy (ESEP) 31
3.3.3. Instruments and Characterization Method 32
3.4. Characterization of ES and ESEP 33
3.5. Curing behavior analysis of ESEP 36
3.6. Mechanical and thermal properties of the cured epoxy resin 39
3.7. Chemically decomposition ESEP/IPDA 41
3.8. Summary 44
Chapter 4. Chemically Decomposable Silane centered Curing Agent 45
4.1. Motivation 45
4.2. Materials 46
4.3. Experimental methods 46
4.3.1. Synthesis and characterization of chemical degradable Dihexylaminosilane (DHS) 46
4.3.2. Synthesis and characterization of chemical degradable Dianilinodimethylsilane curing agent (DAS) 46
4.3.3. Instruments and Characterization Method 47
4.4. Characterization of DHS, DAS 47
4.5. Curing behavior analysis of DHS, DAS 52
4.6. Mechanical and thermal properties of the cured epoxy resin 56
4.7. Summary 58
Chapter 5. General Conclusion 59
References 60
Abstract (in Korean) 62
〈Table 2-1〉 Effect of the reaction time on decomposition BOE/HMDA. 28
〈Table 3-1〉 Effect of the reaction time on decomposition ESEP/IPDA 43
〈Figure 2-1〉 (a) ¹H-NMR and (b) Full range FT-IR spectra of BOE. 19
〈Figure 2-2〉 GC-MS data of BOE 20
〈Figure 2-3〉 (a) DSC first heating and cooling curves for the mixture of BOE and HMDA under a nitrogen atmosphere at heating rate of 10 ℃ min⁻¹ (b) DSC second... 23
〈Figure 2-4〉 (a) Stress-strain curves and corresponding Young's modulus of the BOE/HMDA system through universal testing machine (UTM). (b) TGA (black lines)... 25
〈Figure 2-5〉 (a) Decomposition of BOE/HMDA photographs (b) Mechanism of decomposition procedure of BOE/HMDA (c) FT-IR spectra of BOE/HMDA before... 27
〈Figure 3-1〉 (a) ¹H-NMR of ES (b) ¹H-NMR of ESEP 35
〈Figure 3-2〉 (a) DSC first heating and cooling curves for the ESEP/IPDA mixture under a nitrogen atmosphere at a heating rate of 10 ℃ min⁻¹. (b) DSC curves for the... 38
〈Figure 3-3〉 (a) Representative tensile stress-strain and (b) flexural stress-strain curves and corresponding Young's modulus of the VREP/DDS system. The insets... 40
〈Figure 3-4〉 (a) Decomposition of ESEP/IPDA photographs, (b) Decomposition degree of the ESEP/IPDA with time, (c) de-composition rate constant, (d) FT-IR... 42
〈Figure 4-1〉 (a) ¹H-NMR spectra of DHS and (b) ¹H-NMR spectra of DAS 51
〈Figure 4-2〉 Rheological profiles of (a) the complex viscosity, and (b) storage and loss moduli as a function of time in the VREP and DDS mixture while increasing the... 55
〈Figure 4-3〉 (a) (a) Representative tensile stress-strain DGEBA/DHS and the insets show photographs of the DGEBA/DHS specimens and (b) DGEBA/DAS 57