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首页> 外文期刊>Journal of engineering materials and technology >Mechanical and Electrical Characterization of Two Carbon/Ultra High Molecular Weight Polyethylene Composites Created Via Equal Channel Angular Processing
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Mechanical and Electrical Characterization of Two Carbon/Ultra High Molecular Weight Polyethylene Composites Created Via Equal Channel Angular Processing

机译：通过等通道角加工制备的两种碳/超高分子量聚乙烯复合材料的机械和电气特性

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摘要

Ultra-high-molecular-weight-polyethylene (UHMWPE) has the greatest impact strength of any thermoplastic and has a variety of both industrial and biomedical applications. Equal channel angular processing (ECAP) is a fabrication method for UHMWPE that introduces shear into the polymer matrix by deforming the polymer through an angular channel, with the goal of enhancing mechanical properties. Both nanographite (NG) and carbon black (CB) attract interest as potential carbon additives for use in creating UHMWPE conductive polymer composites (CPC), but they have not yet been extensively tested in conjunction with ECAP. This study presents a systematic evaluation of the mechanical and electrical properties of 1.0 wt % CB/UHMWPE and NG/UHMWPE composites created using ECAP. These samples are compared against pure UHMWPE ECAP controls as well as compression molded (CM) composite samples. Results indicate that both NG and CB carbon additives successfully create CPCs with a corresponding decrease in mechanical properties. ECAP results in comparatively high mechanical and conductive properties when compared with compression molding. Electrical conductivity is shown to be inversely correlated with tensile strain in a repeatable manner, and microstructural theory is discussed. This work suggests a method to produce flexible, conductive UHMWPE composites that vary consistently and predictably with applied strain, which could have a variety of biomedical and industrial applications.
机译：超高分子量聚乙烯（UHMWPE）具有所有热塑性塑料中最大的冲击强度，并具有多种工业和生物医学应用。等通道角加工（ECAP）是一种用于UHMWPE的制造方法，该方法通过使聚合物通过角通道变形来将剪切力引入聚合物基体中，以增强机械性能。纳米石墨（NG）和炭黑（CB）作为用于创建UHMWPE导电聚合物复合材料（CPC）的潜在碳添加剂都引起了人们的兴趣，但尚未与ECAP进行广泛测试。这项研究对使用ECAP制备的1.0 wt％CB / UHMWPE和NG / UHMWPE复合材料的机械和电气性能进行了系统评估。将这些样品与纯UHMWPE ECAP对照样品以及压缩成型（CM）复合样品进行比较。结果表明，NG和CB碳添加剂均可成功创建CPC，但机械性能相应降低。与压缩成型相比，ECAP具有相对较高的机械和导电性能。导电率以可重复的方式与拉伸应变成反比，并讨论了微结构理论。这项工作提出了一种生产柔性导电UHMWPE复合材料的方法，该复合材料会随所施加的应变而一致且可预测地发生变化，这种应变可能具有多种生物医学和工业应用。

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  • 来源
    《Journal of engineering materials and technology》 |2019年第2期|021003.1-021003.7|共7页
  • 作者

    Cook David J.; Chun Hayden H.; Van Citters Douglas W.;

  • 作者单位

    Dartmouth Coll, Thayer Sch Engn, 14 Engn Dr, Hanover, NH 03755 USA;

    Dartmouth Coll, Thayer Sch Engn, 14 Engn Dr, Hanover, NH 03755 USA;

    Dartmouth Coll, Thayer Sch Engn, 14 Engn Dr, Hanover, NH 03755 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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