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首页> 外文学位 >Preparation and properties of polyurethane-carbon black-graphite hybrid composites for electrically conductive applications.
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Preparation and properties of polyurethane-carbon black-graphite hybrid composites for electrically conductive applications.

机译：用于导电应用的聚氨酯-炭黑-石墨杂化复合材料的制备和性能。

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Electrical properties of polymers can be improved by adding carbon-based fillers and reinforcements. In this thesis solvent-borne polyurethane was selected as polymer matrix. A conducting polymer composite is made using a Cowls mixer in dimethyl formamide (DMF) medium with a mixture of carbon black and graphite as conductive fillers. The effect on properties of carbon black, graphite, and mixture was correlated with the microstructure. Electrical resistivity studies on various film thicknesses were performed. The effect of coupling agent and dispersing aids on the mixture was investigated. Different mixing techniques were evaluated to reduce agglomerates and the roughness on the film surface. Thermal, mechanical, electrical properties were evaluated and correlated. A microstructural correlation was also performed. Electrical properties of a mixture of carbon black and graphite were better than the individual carbonaceous fillers. The desired electrical resistivity was achieved by varying the carbon filler content and the compounding conditions.
机译：可以通过添加碳基填料和增强剂来改善聚合物的电性能。本文选择溶剂型聚氨酯为聚合物基体。使用Cowls混合器，在二甲基甲酰胺（DMF）介质中，以炭黑和石墨的混合物作为导电填料，制成导电聚合物复合材料。对炭黑，石墨和混合物的性能的影响与微观结构有关。进行了各种膜厚的电阻率研究。研究了偶联剂和分散助剂对混合物的影响。对不同的混合技术进行了评估，以减少附聚物和薄膜表面的粗糙度。评估并关联了热，机械，电性能。还进行了微结构相关。炭黑和石墨的混合物的电性能优于单独的碳质填料。通过改变碳填料含量和配合条件可以达到所需的电阻率。

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