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Comparison of quasistatic to impact mechanical properties of multiwall carbon nanotube/polycarbonate composites

机译:多壁碳纳米管/聚碳酸酯复合材料准静态影响力学性能的比较

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摘要

We report the quasistatic tensile and impact penetration properties (falling dart test) of injection-molded polycarbonate samples, as a function of multiwall carbon nanotube (MWNT) concentration (0.0-2.5%). The MWNT were incorporated by dilution of a commercial MWNT/polycarbonate masterbatch. The stiffness and quasistatic yield strength of the composites increased approximately linearly with MWNT concentration in all measurements. The energy absorbed in fracture was, however, a negative function of the MWNT concentration, and exhibited different dependencies in quasistatic and impact tests. Small-angle x-ray scattering (SAXS) showed that the dispersion of the MWNT was similar at all concentrations. The negative effects on energy absorption are attributed to agglomerates remaining in the samples, which were observed in optical microscopy and SAXS. Overall, there was a good correspondence between static and dynamic energy absorption.
机译:我们报告了注塑聚碳酸酯样品的准静态拉伸强度和冲击穿透性能(落镖试验),其与多壁碳纳米管(MWNT)浓度(0.0-2.5%)的关系。通过稀释商业的MWNT /聚碳酸酯母料掺入MWNT。在所有测量中,复合材料的刚度和准静态屈服强度随MWNT浓度近似线性增加。但是,断裂中吸收的能量是MWNT浓度的负函数,并且在准静态和冲击测试中表现出不同的依赖性。小角X射线散射(SAXS)表明,MWNT的分散度在所有浓度下均相似。对能量吸收的负面影响归因于样品中残留的团聚体,这在光学显微镜和SAXS中可以观察到。总体而言,静态和动态能量吸收之间存在良好的对应关系。

著录项

  • 来源
    《Journal of Materials Research》 |2010年第6期|1118-1130|共13页
  • 作者单位

    Empa, Swiss Federal Laboratories for Materials Testing and Research,CH-9014 St. Gallen, Switzerland Department of Physics and Materials Science,Uppsala University, SE-751 21 Uppsala, Sweden;

    rnEmpa, CH-8600 Duebendorf Switzerland;

    rnEmpa, CH-8600 Duebendorf Switzerland;

    rnDepartment of Chemical and Materials Engineering, University of Cincinnati,Cincinnati, Ohio 45221-0012;

    rnPaul Scherrer Institute, Swiss Light Source, CH-5232 Villigen PSI, Switzerland;

    rnDepartment of Chemical and Materials Engineering, University of Cincinnati,Cincinnati, Ohio 45221-0012;

    rnLeibniz Institute of Polymer Research Dresden, Department of Polymer Reactions and Blends,D-01069 Dresden. Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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