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wkang918金虫 (正式写手)
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摘 要 采用溶液共混法将POSS（HE-POSS、AB-POSS、MMA-POSS）与聚苯乙烯（PS）复合，制备一种新型的有机/无机纳米复合材料，利用FTIR、NMR对材料结构进行表征，通过DSC、TGA研究复合材料的热性能进行研究。主要研究内容如下： （1）简述了有机/无机纳米复合材料的研究进展，并从制备方法、热性能及力学性能三个方面对聚合物/POSS纳米复合材料进行综述。 （2）采用硅氢化加成反应合成HE-POSS、AB-POSS、MMA-POSS，通过一般自由基聚合反应合成PS。利用FTIR和NMR分别对其结构进行表征。 （3）采用溶液共混法制备HE-POSS/PS、AB-POSS/PS和MMA-POSS/PS纳米复合材料，利用FTIR、SEM对复合材料的结构及表面形貌进行表征，结果发现：当POSS含量较低时，能均匀地分散于复合材料中，随着其含量的增大，出现团聚现象。 （4）利用DSC、TGA研究复合材料的热性能。结果发现：POSS含量较低时，在溶液中形成纳米分散，纳米复合材料的Tg和Td均有所提高；但当POSS含量较高时，纳米复合材料的Tg和Td较均聚物（PS）均呈现下降趋势。 （5）通过三种带有不同活性官能团的POSS对聚合物的热性能影响研究。结果表明：在低浓度时，官能团活性高的POSS（AB-POSS、MMA-POSS）对纳米复合材料的热性能提高较大；在高浓度时，官能团活性高的POSS极易团聚以致纳米复合材料的热性能急剧下降。 |
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wkang918(金币+10,VIP+0):多谢支持 6-6 11:09
wkang918(金币+10,VIP+0):多谢支持 6-6 11:09
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Abstract Solution blending method using POSS (HE-POSS, AB-POSS, MMA-POSS) and polystyrene (PS) composite was prepared by a new type of organic / inorganic nano-composite materials, the use of FTIR, NMR characterization of the structure of materials by DSC, TGA study of the thermal properties of composite materials research. The main research contents are as follows: (1) on the organic / inorganic nano-composite materials, and preparation methods, thermal properties and mechanical properties of three aspects of the polymer / POSS nanocomposites were reviewed. (2) synthesis of silicon hydride addition reaction HE-POSS, AB-POSS, MMA-POSS, through the general radical polymerization Synthesis of PS. The use of FTIR and NMR characterization of its structure, respectively. (3) Preparation of solution blending HE-POSS/PS, AB-POSS/PS and MMA-POSS/PS nanocomposites, using FTIR, SEM of the composite material structure and surface morphology were characterized and found that: When POSS content is low, can be dispersed evenly in the composite material, with the increase of its content, there reunion phenomenon. (4) the use of DSC, TGA study of the thermal properties of composite materials. The results showed that: POSS content is low, in solution the formation of nano-dispersed nanocomposites by Tg and Td are improved; but higher POSS content, the nano-composite materials than the Tg and Td homopolymer (PS) showed a downward trend. (5) with three different active functional groups of POSS on the thermal properties of polymer research. The results showed that: at low concentrations, functional groups with high activity of POSS (AB-POSS, MMA-POSS) nano-composite materials for thermal performance of a larger; in high concentrations, the functional groups of the POSS extremely high activity which reunion nanocomposites sharp decline in the thermal properties. |
2楼2009-06-05 21:48:44
