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Preparation and balanced mechanical properties of solid and foamed isotactic polypropylene/SEBS composites

机译：固体和发泡全同立构聚丙烯/ SEBS复合材料的制备和平衡机械性能

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摘要

This study presents a self-designed foaming apparatus and routes to manufacture foamed isotactic polypropylene (iPP) blends with uniform and dense cells, using styrene-ethylene-butadiene-styrene (SEBS) block copolymer as toughening additive. The addition of SEBS can clearly enhance the impact strength of solid iPP, iPP blends with a 20 wt% SEBS has obtained high notched impact strength of 75 kJ/m(2), which is ca. 16 times larger than that of neat iPP. Relatively fine microcellular iPP-SEBS foams with the average cell size of several micrometers, and the cell density of 10(9) cells/cm(3) were fabricated using a batch foaming procedure. Moreover, using our self-designed mold and compression foaming method, iPP-SEBS foams with balanced mechanical properties were produced. With the increasing of SEBS, tensile strength and flexural strength were slightly decreased, but the impact strength was increased clearly. The balanced mechanical properties between stiffness and toughness were achieved after compression foaming.
机译：本研究以苯乙烯-乙烯-丁二烯-苯乙烯（SEBS）嵌段共聚物为增韧剂，自行设计了一套发泡装置和方法，制备了泡孔均匀致密的等规聚丙烯（iPP）发泡共混物。SEBS的加入可以明显提高固体iPP的冲击强度，SEBS质量分数为20%的iPP共混物的缺口冲击强度高达75 kJ/m（2），约为纯iPP的16倍。采用分批发泡工艺制备了平均孔径为几微米、孔密度为10（9）个/cm（3）的相对细小的微孔iPP-SEBS泡沫。此外，利用我们自行设计的模具和压缩发泡方法，制备出了具有平衡力学性能的iPP SEBS泡沫。随着SEBS用量的增加，拉伸强度和弯曲强度略有下降，但冲击强度明显提高。压缩发泡后获得了刚度和韧性之间的平衡力学性能。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第18期|共16页
  • 作者

    Zhang Xiaoli; Sun Baojia; Yuan Guoyuan; Zhang Shixun; Ji Youxin; Liu Baochen; Zhang Mingxin; Yang Yang; Chen Jingbo;

  • 作者单位

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Yutong Bus Co Ltd Prod Engn Dept Zhengzhou Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Sch Mat Sci &

    Engn Zhengzhou 450001 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    foams; mechanical properties; molding; morphology; thermal properties;

    机译：泡沫;机械性能;成型;形态;热性质;

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