Chapter 1 Advanced Polyimide Films 1 Shi-Yong Yang and Li-Li Yuan 1.1 Introduction 1 1.2 Chemistry of Polyimide Films 3 1.2.1 Thermal Imidization 3 1.2.2 Chemical Imidization 8 1.3 Thermal Curing of Polyimide Films 14 1.3.1 Thermal Imidization Process 14 1.3.2 Influence of Curing Temperatures on Film’s Properties 18 1.4 Structures and Properties of Polyimide Films 20 1.4.1 Advanced Polyimide Films 20 1.4.2 Low-CTE Polyimide Films 28 1.4.3 Transparent Polyimide Films 37 1.4.4 Atomic Oxygen-resistant Polyimide Films 47 1.5 Surface Modification of Polyimide Films 52 1.6 Applications of Polyimide Films 54 1.6.1 Electric Insulating Applications 54 1.6.2 Electronic and Optoelectronic Applications 56 1.6.3 Aerospace Applications 60 1.7 Summary 62 REFERENCES 62
Chapter 2 Advanced Polyimide Fibers 67 Qing-Hua Zhang, Jie Dong and De-Zhen Wu 2.1 Introduction 67 2.2 Synthesis of Spinning Resin Solutions 68 2.2.1 “Two-Step” Polymerization Method 68 2.2.2 “One-Step” Polymerization Method 70 2.3 Preparation of Polyimide Fibers 72 2.3.1 Wet-Spinning Method 72 2.3.2 Dry-Spinning Method 77 2.3.3 Other-Spinning Methods 81 2.4 Structure and Properties of Polyimide Fibers 82 2.4.1 Aggregation Structure of Polyimide Fibers 82 2.4.2 Chemical Structure-Property Relationship 84 2.4.3 Properties of Polyimide Fibers 87 2.5 Applications of Polyimide Fibers 89 2.5.1 Production of Polyimide Fibers 89 2.5.2 Application of Polyimide Fibers 89 2.6 Summary 91 REFERENCES 91
Chapter 3 Polyimide Matrices for Carbon Fiber Composites 94 Shi-Yong Yang and Mian Ji 3.1 Introduction 94 3.2 NA-endcapped Thermoset Matrix Resins 95 3.2.1 Chemistry 96 3.2.2 Structures and Properties 97 3.3 PE-endcapped Oligoimide Resins 107 3.3.1 Chemistry 107 3.3.2 Structures and Properties 108 3.4 Properties of Polyimide/Carbon Fiber Composites 122 3.4.1 Preparation of PMR-type Resin Prepregs 122 3.4.2 Fabrication of Carbon Fiber Composites 122 3.4.3 Properties of NA-Endcapped Polyimide Composites by Autoclave 123 3.4.4 Properties of PE-Endcapped Polyimide Composites by Autoclave 127 3.4.5 Properties of PE-Endcapped Polyimide Composites by RTM 130 3.5 Applications of Polyimide/Carbon Fiber Composites 132 3.6 Summary 134 Contents REFERENCES 134
Chapter 5 Polyimides for Electronic Applications 189 Qing-Hua Lu and Feng Zheng 5.1 Introduction 189 5.2 Polyimide Materials for Microelectronics 190 5.2.1 Combined Property Requirements 190 5.2.2 Typical Applications 192 5.2.3 Structures and Properties of Polyimide Materials for Microelectronics 195 5.3 Polyimide Materials for Optoelectric Planar Displays 206 5.3.1 Liquid Crystal Alignment Layers 206 5.3.2 Mechanical Rubbing Alignment Polyimides 207 5.3.3 Photoinduced Alignment PIs 208 5.3.4 The Microgroove Polyimide Surfaces 216 5.3.5 Langmuir–Blodgett Polyimide Films 217 5.4 Polyimide Materials for Optoelectronic Flexible Displays 217 5.4.1 Combined Property Requirements 217 5.4.2 Polyimides for Flexible Electronic Substrates 221 5.5 Polyimide Materials for Electronic Memories 226 5.5.1 Introduction 226 5.5.2 Polyimides for Resistive-type Memory Devices 229 5.5.3 Polyimides for Transistor-type Memory Devices 238 5.6 Summary 241 REFERENCES 242
Chapter 6 Polyimide Gas Separation Membranes 253 Xiao-Hua Ma and Shi-Yong Yang 6.1 Introduction 253 6.2 Mechanisms of Gas Separation and Testing Methods 255 6.2.1 Gas Transport Mechanism 255 6.2.2 Apparatus for Testing Gas Transport Properties 259 6.3 Structures and Properties of Polyimide Membranes 260 6.3.1 Isomer Structure Effects From Diamines 260 6.3.2 Substitution and Geometric Effects From Diamines 261 6.3.3 Chemical Structure Effects of Dianhydrides 270 6.4 Intrinsically Microporous Polyimide Membranes 276 6.5 Hydroxyl-functionalized Polyimide and Its Derived Polybenzoxazole Membranes 287 6.5.1 Hydroxyl-functionalized Polyimide Membranes 287 6.5.2 Thermally Rearranged Polybenzoxazole (TR-PBO) Membranes 294 6.5.3 Applications of TR-PBO Contents Membranes 301 6.6 Polyimide-Derived Carbon Molecular Sieve Membranes 301 6.6.1 Formation of CMSMs 301 6.6.2 Conversion From Polyimide to CMSMs 302 6.6.3 Structures and Properties of CMSMs 304 6.7 In Summary 314 REFERENCES 314
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