【作者】 刘娟；

【导师】 王红英； 申小清；

【作者基本信息】 郑州大学 ， 材料学， 2010， 硕士

【摘要】 导电聚合物是20世纪70年代发展起来的一个崭新的研究领域,其在能源、光电子器件、传感器、分子导线和分子器件等方面都有诱人的应用前景。与其他五元杂环聚合物,如聚吡咯、聚噻吩相比,聚呋喃研究并没有引起人们的关注。这主要是因为人们无法通过传统的化学聚合法、电化学聚合法获得具有良好共轭结构、较高导电率的聚呋喃化合物。并且因为呋喃本身高的氧化电势,使其难于通过共聚等方法对其改性。本研究采用新的合成路线,通过糠醛、毗咯间的羟甲基化反应实现了共聚,制备得到了具有良好导电性能和机械性能的呋喃-吡咯共聚物膜。我们通过FT-IR、UV-vis等考察了反应条件、共聚组分的变化对共聚物性能的影响；通过FT-IR、TG等考察了共聚物的稳定性；通过FT-IR、UV-vis等考察了碘掺杂过程对聚合物结构、导电率等的影响；通过拉伸实验等考察了共聚物膜的机械性能。我们并对反应机理、导电机理进行了分析和讨论。实验证明,此合成方法可以有效的实现呋喃-吡咯间的共聚,并且能够避免聚合过程中呋喃的开环,提高生成聚合物的共轭性。制备得到的呋喃-吡咯共聚物膜具有良好的环境稳定性和热稳定性、较高的导电率(1.011×10-3 S·cm-1)和良好的机械性能(拉伸断裂强度为10.2 MPa,杨氏模量为333.6 MPa)。更多还原

【Abstract】 Since the conductive polymers were discovered in 1970s, they have attracted increasing interest due to their unique properties and wide applications such as energy, optoelectronic devices, sensors, molecular wires and molecular devices, etc. In contrast to other five heterocyclic polymers like polypyrrole and polythiophene, polyfuran is among the most ill-defined conjugated polymers. This is due to its lower aromaticity and higher oxidation potential compared with other conductive polymers. These inherent defects make polyfuran difficult to be obtained with good conjugated structures by the general chemical polymerization and electrochemical polymerization. Moreover, the problems also induce the failure of optimizations which is carried out by copolymerization. Here, a new synthetic route through the methylolation reaction between furfural and pyrrole was applied. The structures and properties of the copolymers obtained through the method were characterized in detail with infrared (IR) and ultraviolet-visible (UV-vis). The infulence of reaction conditions and copolymer compositions were investigated. In addition, the mechanism of reaction and conducting were discussed. Finally, several important properties, including thermal stability and mechanical properties of copolymers were elaborated.The data indicated that the copolymerization between furfual and pyrrole can achieved successfully by this method. The ring-opening of furan and pyrrole can be avoided during the polymerization. Resultant poly(furan-co-pyrrole) films show favorable environmental stability and thermal stability, high conductivity (1.011×10-3 S·cm-1) and good mechanical properties (10.2 MPa of tensile breaking strength,333.6 MPa of Young’s modulus).更多还原