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研究生:勤竣傑
研究生(外文):Chun-Chieh CHin
論文名稱:光起始聚合反應的動力學研究及其應用
論文名稱(外文):Kinetics of photoinitiated polymerization for various applications
指導教授:黃鼎偉
指導教授(外文):Ding-Wei Huang
口試委員:林晃巖林義彬李允立陳正言
口試委員(外文):Hoang Yan LINYih-Bin LinCharles LiRobert Chen
口試日期:2013-07-26
學位類別:博士
校院名稱:國立臺灣大學
系所名稱:光電工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:英文
論文頁數:114
中文關鍵詞:聚合反應自我封裝自發寫成波導光熱化模擬
外文關鍵詞:polymerizationactive packaging methodself-written waveguidemodeling
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近年來,光固化機制被應用在許多的領域中,例如,牙齒修補、醫學治療、發光二極體的封裝,以及自我寫成光波導等相關應用。在此篇論文中,用於多種應用中的光固化聚合反應之模型被提出。我們也探討了溫度是如何影響固化反應中,光啟始反應速率、光固化速率、以及固化反應的均勻度。再者,用於發光二極體的封裝、自我寫成波導應用中,光啟始固化反應的動力學被詳細得探討。光傳播的行為可以用光速傳播法表示,而從發光二極體表面發出的光強度分度,可由積分每一無限小且位於發光二極體表面的發光源得知。接著我們提出基於有限差分法的模擬流程,來解決光固化反應中光學吸收和固化反應的交互作用。隨時間變化之固化物的形狀可由單體分子濃度的變化所分析且決定。本模擬流程可描繪出固化物之精確的尺寸、形狀,於不同的固化反應條件下,不同的固化時間、光強度、單體濃度、吸收係數等等。最後,我們實作了光二極體封裝實驗,及其他論文實驗的佐證,證明我們的模擬結果符合相關之實驗的結果。

In recent years, Light curing mechanism can be applied in many applications such as dental restorations, medical treatment, LED packaging, self-written waveguide, etc. In this dissertation, the modeling of polymerization of various application is presented. We also discuss the temperature how to influence the photoinitiation rate, and the uniformity of the polymerization. Furthermore, the kinetics of photoinitiated polymerization for active packaging of light-emitting diodes (LEDs), and self-written waveguides is presented thoroughly. The light propagation behavior can be expressed by beam propagation method, and the light distribution emitted from LED chip can be expressed by integrating the infinitesimal emitting area on the LED surface. Then we provide a simulation process based on finite difference method to solve the mechanism between the light absorption and polymerization reaction. The time-evolution of the polymer profile during polymerization can be analyzed as the monomer concentration varies. The proposed technique can depict the shape and precise size of the polymer for any specific parameters in the polymerization reaction, e.g., LED power or laser beam intensity, polymerization time, absorptivity of the epoxy and photolysis. Polymerization experiments for LED packaging and self-written waveguides with different light intensity, polymerization time were made to support our simulation results, and the simulation results agree well with the experiment results.

誌謝 1
摘要 2
Abstract 3
Table of contents 4
Figure captions 7
Table caption 12
Chapter 1 Introduction 13
1.1 Polymerization mechanism 14
1.2 Polymers in everyday life 15
1.2.1 Dental applications 15
1.2.2 Medical treatments 18
1.2.3 LED packaging 23
1.3 Polymerization applications 24
1.3.1 Active packaging method 24
1.3.2 Self-written waveguide 26
1.3.3 Photoinitiated and photothermalized polymerization 27
Chapter 2 Background 29
2.1 Radical chain polymerization 29
2.1.1 Rate of radical chain polymerization 29
2.1.2 Rate expression 32
2.2 LED intensity distribution 34
2.3 Finite difference method 36
2.3.1 Finite difference beam propagation method 38
2.4 Summary 41
Chapter 3 The kinetics of photoinitiated polymerization for Active Packaging of Light-Emitting Diodes 42
3.1 Paper review 43
3.1.1 Uniformity, dynamics of initiator concentration in free-radical photopolymerization 43
3.1.2 Uniformity, dynamics of monomer Conversion in Free-Radical Photopolymerization 47
3.1.3 Active packaging method for blue light-emitting with photosensitive polymerization 51
3.2 Method 54
3.2.1 LED radiation pattern 54
3.2.2 LED intensity distribution 56
3.2.3 Photoinitiated polymerization 58
3.2.4 Process of numerical simulation 58
3.3 Results of encapsulation profile 61
3.4 Summary 67
Chapter 4 The kinetics of photoinitiated polymerization for self-written waveguides for optical connection 68
4.1 Paper review 69
4.1.1 Optical component coupling using Self-written waveguides 69
4.1.2 Self-written waveguides in photopolymerizable resins 76
4.2 Method 79
4.2.1 Electromagnetic waves 79
4.2.2 Photoinitiated polymerization 80
4.2.3 Process of numerical simulation 81
4.3 Simulation results 84
4.4 Summary 88
Chapter 5 Modeling of polymerization via combined mechanism of photoinitiation and photothermalization 89
5.1 Method 92
5.1.1 Heat equation 92
5.1.2 Photoinitiation equation 93
5.1.3 Polymerization rate 93
5.2 Results and discussions 94
5.2.1 The temperature distribution and optimal absorption coefficient 94
5.2.2 The pulsed train laser and linearly increasing laser function 95
5.2.3 Initiator concentration 98
5.2.4 Polymerization rate 101
5.3 Summary 103
Chapter 6 Conclusions 104
References 106


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