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本论文在前人的研究基础上首先合成导电率较高的聚苯胺、聚吡咯及酞菁铜，然后根据不同的制作工艺，制备了导电率较高的导电高分子薄膜吸声材料，同时研究了对该吸声材料的吸声性能的不同影响因素。采用悬浮聚合、分散聚合及乳液聚合等方法，根据聚合物分子设计，以带有侧基的羧基或氨基聚合物的单体如聚苯胺、羧基铜酞菁等，制备了一系列不同结构、粒径及其分布的高分子微粒。采用环氧树脂和聚酰胺树脂作为吸声材料的基体约束材料，对制得的高分子微粒进行了组装以及声学性能研究。并分析了石墨在聚苯胺中的共混对吸声材料的影响，并通过优化工艺得到稳定的条件，从而制备了导电聚合物与石墨的复合吸声材料。 本文分析了混合时间、电导率、表面微观结构，材料厚度、测试方法等因素对吸声材料吸声性能的影响。研究发现，高分子微粒多层次结构及性质对材料的声学性质影响明显，并进一步对材料的吸声性能产生较大影响。这说明材料的微观结构与材料的声阻抗等声学性质密切相关，通过调整高分子微粒材料的多层次结构控制材料的吸声性能是完全可行。一定条件下，适当匹配高分子微粒的特性阻抗和空隙中空气的声阻抗可有效的提高材料吸声系数。 在上述工作的基础上，结合不同的无机导电粒子制备了导电高分子薄膜吸声材料，研究结果表明，具有柔性结构的导电高分子组成的薄膜吸声材料具有宽吸声频带和强吸声能力，在声波125Hz～4000Hz频率范围内的平均吸声系数大于0.5，最大吸声系数达到0.95，尤其是解决了一般吸声材料低频段吸声效果差的缺陷。该薄膜吸声材料的材质轻且薄，厚度只有0.1~0.6毫米、每平方米重量只有200～500 克。 |
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【答案】应助回帖
天上天(金币+5, 翻译EPI+1): 2011-05-10 08:16:04
 this study firstly synthesized the higher conductivity of polyaniline, polypyrrole and copper phthalocyanineon on the basis of the previous studies, , then prepared the higher conductivity of conductive polymer film sound-absorbing materials depending on the different production process, while research the absorption properties of the absorption material of different influence factors. 看看翻译成这水平咋样啊，可以的话剩余的马上到。 |
2楼2011-05-10 00:06:58
高延东
木虫 (正式写手)
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【答案】应助回帖
天上天(金币+195): 2011-05-10 08:18:31
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This thesis based on previous studies first synthetic conductive higher rate of polyaniline, polypyrrole intercalative and copper phthalocyanine content, and then based on the different production process, the preparation of the conductive polymer film higher rates conductive sound-absorbing material, and the absorption material to the sound-absorbing properties of different factors. In suspension polymerization, dispersion polymerization and emulsion polymerization methods, design, according to polymer molecules with side base on the carboxylic or amino polymers monomer polyaniline, carboxyl like copper phthalocyanine content, such as a series of different structure, preparation of polymer particle size and distribution. Using epoxy resin and polyamide resin as the sound-absorbing material, the matrix constraint materials on preparation of polymer particles on the assembly and acoustic properties research. And analyzes the graphite in polyaniline to blend the influence of the sound-absorbing material, and through optimization of process get stable condition, thus preparation of conductive polymers and graphite composite sound-absorbing material. This paper analyzes the time of mixing, conductivity, surface microstructure, material thickness, test method of sound-absorbing material factors such as the influence of sound absorption performance. Study found that high polymer particle multi-layer structure and properties of the acoustic properties of materials, and further affects obviously the absorption properties of materials produced great impact. This explains the microstructural structure and materials such as the acoustic impedance of the acoustic properties by adjusting the polymer is closely related to the particle material multi-layer structure control material sound-absorbing performance is completely feasible. Certain conditions, appropriate characteristic impedance matching polymer particles in the air and space acoustic impedance can effectively increase materials absorption coefficient. On the basis of the above work, combining with the different inorganic conductive conductive polymer film particle preparation sound-absorbing material, the results of the study show that the conductive polymer with flexible structure composed of film sound-absorbing material suction audio with wide and the strong absorption ability, in the sound waves 4000Hz frequency range 125Hz ~ average absorption coefficient exceeds 0.5, maximum absorption coefficients reach 0.95 especially solved generally sound-absorbing material low frequency sound absorption effect is poor defects. This film sound-absorbing material qualitative light and thin, thickness only 0.1 ~ 0.6 millimeter, every square metre weighs only 200 ~ 500 grams. |
3楼2011-05-10 00:15:45