Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
Volume 34, Issue 1
Displaying 1-10 of 10 articles from this issue
Index
Foreword
Technical Notes : Special Issue on Electronic Parts for 5 G Mobile Communications
Technical Report
Principia
Original Paper
  • Riho Nishikawa, Masayuki Yamaguchi
    2021 Volume 34 Issue 1 Pages 25-28
    Published: December 20, 2021
    Released on J-STAGE: January 22, 2022
    JOURNAL FREE ACCESS

    We investigated the structure and properties of extruded high-density polyethylene (HDPE) containing 03. wt.% of multi-walled carbon nanotubes (CNTs). It was found from differential scanning calorimetry measurements that the CNT addition raised the crystallization temperature of HDPE, suggesting that CNT acts as a nucleating agent for HDPE. Furthermore, two-dimensional X-ray diffraction measurements revealed that the CNT addition greatly enhanced the chain orientation of HDPE in the extruded strand, which was pronounced by melt-stretching after passing through the die. CNTs orientated parallel to the flow direction behave like extended chain crystals, and thus accelerate the formation of shish-kebab structure. As a result, the tensile modulus was enhanced by the CNT addition, which was pronounced especially in the high temperature region.

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