【作者】 林婷；

【导师】 翁家宝； 孙建平；

【作者基本信息】 福建师范大学 ， 高分子化学与物理， 2008， 硕士

【摘要】 目前对PPV的研究主要集中在聚合物侧链上的修饰、主链结构的调整以及与无机纳米材料的复合，这样既能改善刚性PPV结构的溶解性，又可以完善PPV类聚合物的发光颜色。本文采用强碱诱导的脱氯化氢缩合聚合法，合成了五种可溶性不对称烷氧基取代聚对苯乙炔衍生物（ROPPVs），通过引入不同长度的烷氧基柔性基团，对PPV的侧链进行修饰，提高了材料的溶解性，使PPV类聚合物可直接旋涂成膜，简化工艺。不对称ROPPVs不但保持了PPV本身的故有发光性能，而且由于引入不同长度的烷氧基，使得PPV聚合物的能隙显著降低，调节了光致发光的发射波长。在此基础上，采用共聚的方法，将具有不同结构的PPV衍生物分子进行共聚，合成了三种可溶性不对称烷氧基取代聚对苯乙炔共聚物，从而改善了材料的热性能和光致发光特性。为了进一步改善不对称ROPPVs的发光性能和热性能，首次采用原位脱氯化氢缩合聚合法，合成出一系列不对称烷氧基取代聚对苯乙炔衍生物／纳米半导体复合材料。将不对称ROPPVs分别与纳米稀土氧化物、二元稀土配合物Eu（phen）₂Cl₃以及纯化的SWNTs进行复合，合成出不对称烷氧基取代聚对苯乙炔／纳米稀土氧化物复合材料(如PMOBOPV／Eu₂O₃和PMOCOPV/(Y₂O₃：Eu³⁺)纳米复合材料)、PMOCOPV／Eu（phen）₂Cl₃杂化材料和PMOCOPV／SWNTs纳米复合材料。研究表明，由于无机材料的加入，使得这些复合材料的热稳定性较各自纯的不对称ROPPV材料得到提高：同时不同无机材料对聚合物有不同的影响，从而使得四种复合材料具有不同的光致发光发射波长，表现出不同的光致发光特性，这些都为其作为电致发光器件的发光层物质创造了更有利的条件。更多还原

【Abstract】 At present, the study of PPV concentrates mainly on the polymer side chain modification, the main chain structure adjustment as well as polymer/inorganic nanocomposites, which can improve solubility and luminescence color of PPV.Five soluble poly（phenylene vinylene） derivatives with asymmetric alkoxyl substituents （ROPPVs） were prepared by dehydrochlorination reaction. The solubility of five materials can be enhanced by introducing the flexible alkoxy groups with different length to the side chain of PPV for modification.Therefore these films can be obtained by spin-coated method, which can simplify technology. Not only PPV luminescence performance can be preserved by asymmetric ROPPVs but also photoluminescence emission wavelength of PPV can be adjusted by decreasing significantly the energy band-gap. On this basis, three soluble poly（phcnylene vinylene） derivatives with asymmetric alkoxyl substituents copolymers were synthesized by copolymerization with different PPV derivatives. The luminescence characteristic and thermal performance of three copolymers were improved by copolymerization.In order to improve the luminescence and thermal performance of asymmetric ROPPVs, a series of poly（phenylene vinylene） derivatives with asymmetric alkoxyl substituents/ nanometer semiconductor composites were synthesized through dehydrochlorination in-situ polymerization. Poly（phenylene vinylene） derivatives with asymmetric alkoxyl substituents/rare earth oxides composites, such as PMOBOPV/EU₂O₃ and PMOCOPV/ (Y₂O₃:Eu³⁺) nanocomposites, PMOCOPV/Eu（phen）₂Cl₃ hybrid materials and PMOCOPV/SWNTs nanocomposites were prepared by the methods that the asymmetric ROPPVs reacted with nanometer rare earth oxide、rare earth complex Eu（phen）₂Cl₃ and purified SWNTs respectively. The results indicate that thermal stability of these composites are improved significantly. At the same time, because various inorganic materials have different effects on polymers, four composites present different photoluminescence emission wavelengths and photoluminescence characteristics. Conclusion suggests that these all provide more advantageous conditions with emitting layers of electroluminescence device.更多还原