發(fā)布時間：2020-12-04 19:35

　　芳香族聚酰亞胺是一類高性能的高分子材料,由于其具有優(yōu)異的熱、電、機械穩(wěn)定性和良好的耐化學性能,在航空航天、微電子等領域有著重要的應用。然而,為了滿足高性能材料在航空航天和電子工業(yè)中日益增長的需求,需要生產(chǎn)出能長時間忍受高溫的易加工低成本的聚酰亞胺樹脂。同樣作為高性能雜環(huán)聚合物的苯并唑類聚合物,特別是聚苯并咪唑和聚苯惡唑,由于其優(yōu)異的力學性能、熱及氧化穩(wěn)定性,也引起了人們廣泛的研究興趣。然而,這些雜環(huán)聚合物的主要缺點是由于它們的剛性骨架結構、不溶不熔而導致的苛刻的加工條件。單體或聚合物結構改性調(diào)控被認為是性能優(yōu)化平衡的有效途徑。因此,本論文研究基于酰亞胺和苯并唑類單元（即苯并咪唑、苯并惡唑）的共聚物,旨在整合其優(yōu)異的力學、熱學性能以及提高其加工性能。（1）通過改變剛性的2-（4-氨基苯基）-5-氨基苯并咪唑（BIA）和柔性的4,4’-二氨基二苯醚（ODA）,采用一步法制備了兩個系列的基于3,3’三苯二醚二酐（3,3’-HQ DPA）的封端的聚酰亞胺均聚物和共聚物,以擴大可熔融加工的聚酰亞胺的工作溫度范圍。研究結果發(fā)現(xiàn)聚合物具有優(yōu)異的性能:如良好的溶解性,高的玻璃化轉變溫度（Tg=354-... 

【文章來源】：中國科學院大學(中國科學院寧波材料技術與工程研究所)浙江省

【文章頁數(shù)】：147 頁

【學位級別】：博士

【文章目錄】：
摘要
ABSTRACT
CHAPTER 1:Theoretical background
    1.1 Polyimides
    1.2 Synthetic methods and mechanisms
        1.2.1.Two-step polycondensation
            1.2.1.1 Thermal imidization of poly（amic acid）s
            1.2.1.2 Chemical imidization of poly（amic acid）s
        1.2.2.High temperature one-step polycondensation
        1.2.3.Polyimides via aromatic nucleophilic substitution polymerization
    1.3 Structural modifications to improve properties of polyimides
        1.3.1.Polyimides with flexible ether linkages
        1.3.2.Asymmetric polyimides
        1.3.3.Isomeric polyimides
    1.4 Polybenzazoles
        1.4.1.Polybenzimidazole
            1.4.1.1 Historical background of PBI
            1.4.1.2 Synthetic methods
            1.4.1.3 Structural modifications
                Poly （arylene ether benzimidazole） by SNAr
                Polybenzimidazole-polyimides
        1.4.2.Polybenzoxazole
            1.5.1.1 Synthetic methods
            1.5.1.2 Structural modifications
                Poly（aryl ether-benzoxazoles）by SNAr
                Polybenzoxazole polyimide
    1.5 Research strategy,objectives and its significance
CHAPTER 2:Materials and experimental instrumentatin
    2.1 Materials
        2.1.1 Diamines and （di） anhydrides
        2.1.2 Solvents
        2.1.3 Other reactants
    2.2 Instrumentation
        2.2.1.Physical properties （melting point, viscosity and solubility） measurements
        2.2.2.NMR spectroscopy
        2.2.3.Fourier transform infrared spectra（FT-IR）
        2.2.4.Gas chromatography mass spectrometry （GC-MS）
        2.2.5.Ground state geometry
        2.2.6.TGA/DSC
        2.2.7.Tensile properties measurements
        2.2.8.UV-vis analysis
        2.2.9.Water uptake measurement
        2.2.10.Wide-angle X-ray diffraction
        2.2.11.Molten index instrument
        2.2.12.Rotational physical Rheometer
g, melt processable copolyimides based on isomeric 3,3" and="" 4,4'-hdroquinone="" diphthalic="" anhydride="" （hqdpa）'="">CHAPTER 3:High T_g, melt processable copolyimides based on isomeric 3,3'and 4,4'-hdroquinone diphthalic anhydride （HQDPA）
    3.1 Introduction
    3.2 Synthesis of polymers
    3.3 Results and discussion
        3.3.1.Synthesis and characterization
        3.3.2.Thermal properties
        3.3.3.Mechanical properties
        3.3.4.Dynamic mechanical properties
        3.3.5.Solubility
        3.3.6.Rhelogical Properties
            3.3.6.1 Melt flow index （MFI）
            3.3.6.2 Melt Processability
        3.3.7.Optical Properties
        3.3.8.Wide-angle X-ray diffraction
    3.4 Summary
CHAPTER 4:Processable, high Tg polyimide from unsymmetrical diamines containing 4-phenoxy aniline and benzimidazole moieties
    4.1 Introduction
    4.2 Synthesis of diamines and polymers
    4.3 Result and discussion
        4.3.1 Synthesis and characterization
        4.3.2 Thermal properties
        4.3.3 Dynamic mechanical properties
        4.3.4 Solubility
        4.3.5 Mechanical properties
        4.3.6 Wide-angle X-ray diffraction
        4.3.7 Controlled Mw polymers
    4.4 Summary
CHAPTER 5:Processable poly（benzoxazole imide）s derived from asymmetric benzoxazolediamines containing 4-phenoxy aniline:Synthesis,properties and isomeric effect
    5.1 Introduction
    5.2 Synthesis of monomers and polymers
    5.3 Results and discussion
        5.3.1.Synthesis and characteriaztion
        5.3.2.Phase transition
        5.3.3.Thermal properties
        5.3.4.Dynamic mechanical properties
        5.3.5.Solubility
        5.3.6.Mechanical properties
        5.3.7.UV-Vis
        5.3.8.Wide-angle X-ray diffraction
        5.3.9.Controlled Mw polymers
    5.4 Summary
g and organosoluble poly（N-arylene benzimidazole etherimide） copolymers by C-N/C-O coupling reaction">CHAPTER 6:Synthesis of high T_g and organosoluble poly（N-arylene benzimidazole etherimide） copolymers by C-N/C-O coupling reaction
    6.1 Introduction
    6.2 Synthesis of monomers and polymers
    6.3 Result and discussion
        6.3.1 Synthesis and characterization
        6.3.2 Solubility
        6.3.3 Thermal properties
        6.3.4 Mechanical properties
        6.3.5 Dynamic mechanical properties
        6.3.6 Water uptake
        6.3.7 Wide-angle X-ray diffraction
    6.4 Summary
CHAPTER 7:Conclusion and outlook
REFERENCES
PUBLICATION LIST
ACKNOWLEDGEMENTS


【參考文獻】：
期刊論文
[1]Synthesis of a new pyridine-containing diamine and related polyimide[J]. Jiu Jiang Zhao,Chen Liang Gong,Shu Jiang Zhang,Yu Shao,Yan Feng Li~* State Key Laboratory of Applied Organic Chemistry,College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology,Lanzhou University,Lanzhou 730000,China.  Chinese Chemical Letters. 2010(03)



本文編號：2898133