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  • An Alternating Skin–Core Structure in Melt Multi-Injection-Molded Polyethylene
  • 来源:刘宪虎教授个人网站 2018-03-21
  • Shish-kebab, which is endowed with superior strength and modulus,

    provides the potential to fabricate self-reinforced polymer products. However,

    the injection-molded product usually exhibits a typical skin–core structure,

    and the shish-kebab is only located in an extremely thin shear layer. Therefore,

    the controlling and tailoring of crystal structures in complex flow field to

    improve the mechanical properties of the injection-molded sample are still a

    great challenge. Herein, for the first time, high-density polyethylene sample

    with a novel macroscopic alternating skin–core structure is achieved using a

    melt multi-injection molding technique. Results show that, with increasing

    the amount of melt injection, the layers of skin–core structure increase in

    the form of arithmetic progression, and therefore the tensile strength of the

    samples progressively increases due to an increase of shish-kebab content.

    This study demonstrates a new approach to achieve multilayer homogeneous

    materials with excellent tensile strength via macroscopic structural design

    during the practical molding process.


  • [来源:中国聚合物网]
  • 了解更多请进入: 刘宪虎教授个人网站
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