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An experimental study of dynamic behaviour of graphite-polycarbonatediol polyurethane composites for protective coatings

机译:石墨-聚碳酸酯二醇聚氨酯复合材料防护涂料动力学行为的实验研究

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摘要

Segmented polycarbonatediol polyurethane (PUPH) has been synthesized and modified with different amounts of graphite conductive filler (from 0 to 50wt%). Thermal and dynamical thermal analysis of the composites clearly indicates changes in the polyurethane relaxations upon addition of graphite. Broadband dielectric spectroscopy has been used to study the dielectric properties of the (PUPH) and one composite in the frequency range from 10~2 to 10~7 Hz and in the temperature window of-140 to 170 ℃. Relaxation processes associated with different molecular motions and conductivity phenomena (Maxwell-Wagner-Sillars and electrode polarization) are discussed and related to the graphite content.
机译:已合成了分段聚碳酸酯二醇聚氨酯(PUPH),并用不同量的石墨导电填料(0至50wt%)进行了改性。复合材料的热和动态热分析清楚地表明了添加石墨后聚氨酯弛豫的变化。宽带介电谱已被用于研究PUPH和一种复合材料在10〜2至10〜7 Hz的频率范围内以及-140至170℃的温度范围内的介电性能。讨论了与不同分子运动和电导现象(麦克斯韦-瓦格纳-西拉和电极极化)相关的弛豫过程,并涉及石墨含量。

著录项

  • 来源
    《Applied Surface Science》 |2013年第15期|295-302|共8页
  • 作者单位

    Materials Science Institute, University of Valencia, P.O. Box 22085,46071 Valencia, Spain;

    Materials Science Institute, University of Valencia, P.O. Box 22085,46071 Valencia, Spain;

    Materials Science Institute, University of Valencia, P.O. Box 22085,46071 Valencia, Spain;

    Instituto de Tecnologia Electrica, Departamento de Termodindmica Aplicada, ETSII, Universitat Politecnica de Valencia, Valencia, Spain;

    Instituto de Tecnologia Electrica, Departamento de Termodindmica Aplicada, ETSII, Universitat Politecnica de Valencia, Valencia, Spain;

    Instituto de Tecnologia Electrica, Departamento de Termodindmica Aplicada, ETSII, Universitat Politecnica de Valencia, Valencia, Spain;

    Instituto de Tecnologia Electrica, Departamento de Termodindmica Aplicada, ETSII, Universitat Politecnica de Valencia, Valencia, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dielectric; Polyurethane; Expanded graphite; Composites;

    机译:电介质聚氨酯膨胀石墨;复合材料;

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