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首页> 外文期刊>Journal of Materials Science >Tailored crystalline structure and enhanced impact strength of isotactic polypropylene/high-density polyethylene blend by controlling the printing speed of fused filament fabrication
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Tailored crystalline structure and enhanced impact strength of isotactic polypropylene/high-density polyethylene blend by controlling the printing speed of fused filament fabrication

机译：通过控制熔融丝制造的印刷速度，定制晶体结构和同位聚丙烯/高密度聚乙烯混合物的增强冲击强度

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摘要

Fused filament fabrication (FFF) is the most commonly used 3D printing technology. In this work, the isotactic polypropylene/high-density polyethylene blend was used for FFF for the first time. A printing platform with arrays of conical holes was designed to overcome the warpage deformation of product. In order to investigate the influences of shearing force during the nozzle-extrusion process and stretching force during deposition process on the part property, various printing speeds were selected for series of samples. WAXD, SAXS and SEM measurements were used to study the phase morphology and crystalline structure of components. Results reveal that with the increase in printing speed, the PP crystal would deform into shish-kebab structure and PE crystal would deform into epitaxy crystalline structure owing to the strong shearing and stretching forces. These structures improved the impact strength by about 5 times. The printing speed showed slight influence on the thermal behavior. This work confirms the applicability of semicrystalline polymer in FFF technology and gives a deep understanding toward the printing conditions and part property. The obtained results also provide a new method to fabricate high-performance product which will broaden the research field of FFF.
机译：熔丝灯丝制造（FFF）是最常用的3D印刷技术。在这项工作中，首次使用同位聚丙烯/高密度聚乙烯共混物FFF。设计具有锥形孔阵列的印刷平台，旨在克服产品的翘曲变形。为了研究剪切力在沉积过程中剪切力和沉积过程中的拉伸力的影响，为一系列样品选择了各种印刷速度。用于研究组分的相位形态和晶体结构的蜡淋巴，SAX和SEM测量。结果表明，随着印刷速度的增加，PP晶体将变形成烤肉串结构，由于强剪切和拉伸力，PE晶体将变形为外延晶体结构。这些结构将冲击强度提高了约5次。印刷速度对热行为显示出轻微的影响。这项工作证实了半结晶聚合物在FFF技术中的适用性，并对印刷条件和部分性能进行了深入的理解。所获得的结果还提供了一种制造高性能产品的新方法，这将拓宽FFF的研究领域。

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  • 来源
    《Journal of Materials Science》 |2020年第28期|共16页
  • 作者

    Leng Jie; Gu Xuanbo; Hong Rui; Zhang Jie;

  • 作者单位

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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