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首页> 外文期刊>Polymer Composites >Effect of the Grafted Silane on the Dispersion and Orientation of Clay in Polyethylene Nanocomposites
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Effect of the Grafted Silane on the Dispersion and Orientation of Clay in Polyethylene Nanocomposites

机译：硅烷接枝对粘土在聚乙烯纳米复合材料中分散和取向的影响

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摘要

The CTAB ammonium intercalated montmorillonite clay, CMT, was modified by an alkylsilane, Dodecyl-trimethoxylsilane, to improve the miscibility of organo-clays with PE matrix, involving the grafting reaction between the silane and silanol groups on the edge of clay. The silane modified clays (DMT) exhibited improved thermal stability due to the replacement of the physically adsorbed ammonium by the covalently bonded silane. The clays were melt compounded with polyethylene. Compared with the composite of PE/ CMT, the clay dispersion state was improved, and a unique orientation of the clay layered was observed in PE/DMT nanocomposites, which was confirmed by XRD and TEM studies. The dispersion state, orientation degree of clay and, as a result, the mechanical and thermal properties of the nanocomposites were enhanced with the increasing amount of the grafted silane, indicating that the edge grafting of silane played a crucial role in controlling the structure and properties of nanocomposites.
机译：CTAB铵插层蒙脱土粘土CMT被烷基硅烷十二烷基三甲氧基硅烷改性，以改善有机粘土与PE基体的混溶性，这涉及粘土边缘的硅烷与硅烷醇基团之间的接枝反应。硅烷改性的粘土（DMT）由于用共价键合的硅烷代替了物理吸附的铵，因此具有改进的热稳定性。将粘土与聚乙烯熔融复合。与PE / CMT复合材料相比，PE / DMT纳米复合材料的粘土分散状态得到改善，并且粘土的独特取向得到了观察，这通过XRD和TEM研究得到了证实。随着接枝硅烷含量的增加，纳米复合材料的分散状态，取向度以及纳米复合材料的机械和热性能均得到增强，这表明硅烷的边缘接枝在控制结构和性能方面起着至关重要的作用。纳米复合材料。

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