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首页> 外文期刊>RSC Advances >Unusual hierarchical structures of micro-injection molded isotactic polypropylene in presence of an in situ microfibrillar network and a beta-nucleating agent
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Unusual hierarchical structures of micro-injection molded isotactic polypropylene in presence of an in situ microfibrillar network and a beta-nucleating agent

机译：在原位微生物网络和β成核剂存在下，微注塑模塑同向异形聚丙烯的不寻常的分层结构

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摘要

The microstructural and mechanical properties of isotactic polypropylene (iPP), in situ PET microfibrils, and beta-nucleating agent blends obtained from micro-injection molding were investigated via polarized light microscopy, differential scanning calorimetry, scanning electron microscopy, and two-dimensional wide-angle X-ray diffraction. The results indicate that addition of PET microfibrils markedly increases crystallization temperatures, and increases the thickness of the final oriented layer. Introduction of PET microfibrils to beta-nucleation agent-nucleated iPP samples leads to formation of oriented beta-crystals epiphytic on the surface of PET fibers in the inner region; this feature improves adhesion between the fiber and the matrix and simultaneously improves the strength and toughness of the final PP/0.5/15 microparts (e.g., the tensile strength increased by 12 MPa and the elongation at break increased by 1.2%) compared with those of iPP microparts. Taken together, the results of this study introduce an alternative approach to optimize the properties of MIM parts.
机译：通过偏振光显微镜，差示扫描量热法，扫描电子显微镜，扫描电子显微镜和二维宽，研究了从微注射成型获得的本地聚丙烯（IPP），原位PET微纤维和β-成核剂共混物的微观结构和力学性能。角X射线衍射。结果表明，宠物微纤维的添加显着增加了结晶温度，并增加了最终取向层的厚度。将PET微纤维引入β-成核剂 - 成核的IPP样品导致在内部区域的PET纤维表面上形成取向的β-晶体eBipytic;该特征改善了纤维和基质之间的粘附性，同时提高了最终PP / 0.5 / 15微创的强度和韧性（例如，与那些相比IPP MicroParts。携带在一起，本研究结果介绍了一种替代方法来优化MIM零件的性能。

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  • 来源
    《RSC Advances》 |2015年第54期|共10页
  • 作者

    Zhao Zhongguo; Yang Qi; Kong Miqiu; Tang Dahang; Chen Qianying; Liu Ying; Lou Fangli; Huang Yajiang; Liao Xia;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Sch Aeronaut &

    Astronaut Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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