Kinetic Analysis and Characterization of Epoxy Resins ... - FedOA

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Experimental 54 Characteristic Notes Values Colour of EC 57 – Pale yellow Colour of K 21 – Pale yellow Density at 25 ◦ C of EC 57 ASTM D 1475 1,14 – 1,16 g/ml Density at 25 ◦ C of K 21 ASTM D 1475 0,99 – 1,01 g/ml WeightratioofK21 For100gofresin 15–20g Viscosity at 25 ◦ C – 500 – 800 cPs Table 2.1: Characteristic of epoxy system before curing. 2.1.2 Characteristics of Epoxy System Conventionally Cured According to technical datasheet the characteristics of the epoxy system, conventionally cured for 24 h at room temperature and following 15 h at 60 ◦ Care reported in Table 2.2. 2.1.3 Sample Preparation In the work reported here formulation with 20 p.h.r. of K 21 into EC 57 3 has been prepared. For ensuring a good reproducibility of the test the same procedure has been repeated in every experiment. Primarily the components of the mixture have been weighted on a technical scales. The reagents have been collected from their butts, with glass pipette, previously calibrated and poured in a polypropylene (PP) vessel. The first component introduced into the vessel has been K 21, because it is the limiting reagent. 3 Corresponding to stoichiometric ratio. 54
Experimental 55 Characteristic Notes Values Colour – Amber Density ASTM D 792 1,09 – 1,12 g/ml Hardness Shore ASTM D 2240 87 – 88 D/15 Greatest T g after 3 h at 100 ◦ C ASTM D 3418 108 − 112 ◦ C Linear shrinkage – 1,70 – 2,20% Water absorption ASTM D570 0,80 – 1,00 % Greatest exercise temperature – 100 ◦ C Flexural strength ASTM D 790 85 – 95 MN m 2 Greatest deformation ASTM D 790 5,4 – 6,1 % Flexural elasticity modulus ASTM D 790 2600 – 2800 MN m 2 Tensile strength ASTM D 638 50 – 60 MN m 2 Elongationatbreak ASTMD638 4–5% Compression strength ASTM D 695 90 – 100 MN m 2 Table 2.2: Characteristics of epoxy system cured, according to the supplier protocol. 55
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UNIVERSITA’ DEGLI STUDI DI NAPOLI
Page 3 and 4: 3 I thank all the lecturers of PhD
Page 5 and 6: 5 Microwaves are electromagnetic ra
Page 7 and 8: CONTENTS 7 1.8.1 DielectricProperti
Page 9 and 10: CONTENTS 9 4 Conclusions and Outloo
Page 11 and 12: LIST OF TABLES 11 3.2 Average value
Page 13 and 14: List of Figures 1.1 Diglycidylether
Page 15 and 16: LIST OF FIGURES 15 2.23 Onset tempe
Page 17 and 18: LIST OF FIGURES 17 3.38 Comparison
Page 19 and 20: Introduction 19 cannot be melted an
Page 21 and 22: Introduction 21 • bismaleimides;
Page 23 and 24: Introduction 23 cold solders, casti
Page 25 and 26: Introduction 25 Average Properties
Page 27 and 28: Introduction 27 In Figure 1.4 n can
Page 29 and 30: Introduction 29 ducts and it genera
Page 31 and 32: Introduction 31 tween current-carry
Page 33 and 34: Introduction 33 that describe the p
Page 35 and 36: Introduction 35 1.3.5 Lorentz Force
Page 37 and 38: Introduction 37 Figure 1.11: Electr
Page 39 and 40: Introduction 39 Even microwaves can
Page 41 and 42: Introduction 41 production requirem
Page 43 and 44: Introduction 43 fect of the electro
Page 45 and 46: Introduction 45 following different
Page 47 and 48: Introduction 47 Debye equations bas
Page 49 and 50: Introduction 49 Although these mode
Page 51 and 52: Introduction 51 materials that have
Page 53: Chapter 2 Experimental In this chap
Page 57 and 58: Experimental 57 If the oven is used
Page 59 and 60: Experimental 59 In monomodal applic
Page 61 and 62: Experimental 61 Figure 2.5: Right s
Page 63 and 64: Experimental 63 Figure 2.8: Front v
Page 65 and 66: Experimental 65 regardless of the a
Page 67 and 68: Experimental 67 • The number of t
Page 69 and 70: Experimental 69 Figure 2.11: Surfac
Page 71 and 72: Experimental 71 Figure 2.12: Repeti
Page 73 and 74: Experimental 73 From the Figure 2.1
Page 75 and 76: Experimental 75 in the centre of th
Page 77 and 78: Experimental 77 not read the water
Page 79 and 80: Experimental 79 Test number 1 2 3 4
Page 81 and 82: Experimental 81 Figure 2.19: Plot o
Page 83 and 84: Experimental 83 2.5 Datalogger This
Page 85 and 86: Experimental 85 same reason a wood
Page 87 and 88: Experimental 87 Material Behaviour
Page 89 and 90: Experimental 89 in function of the
Page 91 and 92: Experimental 91 2.6.3 Influence of
Page 93 and 94: Chapter 3 Results and Discussion Th
Page 95 and 96: Results and Discussion 95 There is
Page 97 and 98: Results and Discussion 97 Figure 3.
Page 99 and 100: Results and Discussion 99 Parameter
Page 101 and 102: Results and Discussion 101 After pr
Page 103 and 104: Results and Discussion 103 of insta
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Results and Discussion 105 1. Mecha
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Results and Discussion 107 where k
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Results and Discussion 109 Kinetic
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Results and Discussion 111 Figure 3
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Results and Discussion 113 3.3 Comp
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Results and Discussion 115 pedestal
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Results and Discussion 117 Tables 3
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Results and Discussion 123 t MW [s]
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Results and Discussion 125 simulate
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Results and Discussion 129 t DSC [s
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Results and Discussion 133 Using th
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Results and Discussion 135 forward
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Page 141 and 142:
Results and Discussion 141 than the
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Results and Discussion 143 Since ev
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Results and Discussion 145 ditions.
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Results and Discussion 147 3.23 and
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Results and Discussion 149 The T g
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Results and Discussion 151 3.6.1 St
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Results and Discussion 153 Flexural
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Results and Discussion 155 3.7.2 FT
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Results and Discussion 157 identifi
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Results and Discussion 159 This eff
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Results and Discussion 161 Also in
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Conclusions and Outlook 163 degree
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Appendix A A Brief History of Micro
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A Brief History of Microwave Oven 1
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Bibliography [1] W. Callister, “M
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BIBLIOGRAPHY 171 [19] P. I. Karkana
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BIBLIOGRAPHY 173 [34] K. D. V. Pras
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Kinetic Analysis and Characterization of Epoxy Resins ... - FedOA

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