Spatial Distribution of Chain Stems and Chain Folding Mode in Polyethylene Lamellae as Revealed by Coupled Information of DSC, FT-IR, SANS, and WANS.

• Sasaki Sono

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Tashiro Kohji

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Gose Naomi

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Imanishi Kouji

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Izuchi Masaaki

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Kobayashi Masamichi

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• Imai Masayuki

  Institute for Solid State Physics, The University of Tokyo

• Ohashi Masayoshi

  Institute for Materials Research, Tohoku University

• Yamaguchi Yasuo

  Institute for Materials Research, Tohoku University

• Ohoyama Kenji

  Institute for Materials Research, Tohoku University

抄録

Aggregation structure of polyethylene (PE) chains in the crystalline state as well as in the molten state was investigated by an organized combination of the small-angle neutron scattering, infrared spectra and thermal analysis. The used samples were the blends between the deuterated and hydrogeneous PE (and n-alkane), which were cocrystallized almost perfectly into the common lamella even when they were cooled slowly from the melt. The quantitative analysis of the small-angle neutron scattering data showed that the D and H species were homogeneously mixed in the melt and the radius of gyration of a chain was kept unchanged even when the chains were enrolled together into the crystalline lamellae. On the basis of the quantitative analysis of infrared spectra, the chain stems included in the crystalline lamella were found to be gathered together in a statistically random fashion. This structural idea could be also used reasonably to interpret the dependence of the melting point on the D/H content. From all these data it was concluded that the chain folding in the PE lamella occurs in a statistically random reentry mode even for the PE samples crystallized slowly from the melt under the normal condition.

収録刊行物

• Polymer Journal

  Polymer Journal 31 (8), 677-686, 1999

  The Society of Polymer Science, Japan

キーワード

• Polyethylene
• Blend
• Aggregation Structure
• Cocrystallization
• Differential Scanning Calorimetry
• Fourier-Transform Infrared Spectra
• Small-Angle Neutron Scattering
• Wide-Angle Neutron Scattering
• Radius of Gyration

詳細情報

• CRID: 1390282681266438016
• NII論文ID: 130004430123
• NII論文ID: 10006280945
• NII書誌ID: AA00777013
• DOI: 10.1295/polymj.31.677
• COI: 1:CAS:528:DyaK1MXlt1Grs78%3D
• ISSN: 13490540
• ISSN: 00323896
• NDL書誌ID: 4823892
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4823892
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可