論文
カーボンナノチューブを添加したポリエチレンのシシカバブ構造形成に及ぼす加熱延伸の影響
2021 年 34 巻 1 号 p. 25-28
詳細
2021 年 34 巻 1 号 p. 25-28
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.
