Surface structure of asymmetric fluorinated block copolymers

Hideaki Yokoyama, Keiji Tanaka, Atsushi Takahara, Tisato Kajiyama, Kenji Sugiyama, Akira Hirao

研究成果: ジャーナルへの寄稿記事

51 引用 (Scopus)

抄録

Surface structures of asymmetric poly[styrene-block-4-(perfluorooctylpropyloxy)styrene] block copolymers (PS-PF) with the shorter PF block than the PS block have been investigated using X-ray photoelectron spectroscopy (XPS) and dynamic secondary ion mass spectrometry (SIMS). Fluorooctyl side groups (C8F17) of the block copolymers segregate to the surface due to their low surface energy. Asymmetry of the block remarkably influences the structure of the C8F17 side groups and the backbone of PS-PF copolymers at the surface. When a weight fraction of the PF block, fPF wt, is 0.09, the surface is partially covered by the C8F17 side groups with a thickness thinner than the length of the C8F17 side group. The C8F17 side groups hence lie parallel to the surface. When fPF wt is approximately 0.25, the backbone of the PF block lies parallel to the surface, and the C8F17 side groups stand perpendicular to the surface. Such a conformation results in a domain thickness of the PF block comparable to the length of the C8F17 side group. However, as fPF wt goes beyond 0.3, the backbone of the PF block orients toward the surface while the top surface region, i.e., 1.5 nm from the surface, is still occupied by the C8F17 side groups standing perpendicular to the surface.

元の言語英語
ページ(範囲)939-945
ページ数7
ジャーナルMacromolecules
37
発行部数3
DOI
出版物ステータス出版済み - 2 10 2004

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Surface structure
Block copolymers
Styrene
Secondary ion mass spectrometry
Interfacial energy
Conformations
X ray photoelectron spectroscopy
Copolymers

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Surface structure of asymmetric fluorinated block copolymers. / Yokoyama, Hideaki; Tanaka, Keiji; Takahara, Atsushi; Kajiyama, Tisato; Sugiyama, Kenji; Hirao, Akira.

:: Macromolecules, 巻 37, 番号 3, 10.02.2004, p. 939-945.

研究成果: ジャーナルへの寄稿記事

Yokoyama, H, Tanaka, K, Takahara, A, Kajiyama, T, Sugiyama, K & Hirao, A 2004, 'Surface structure of asymmetric fluorinated block copolymers', Macromolecules, 巻. 37, 番号 3, pp. 939-945. https://doi.org/10.1021/ma035191f
Yokoyama, Hideaki ; Tanaka, Keiji ; Takahara, Atsushi ; Kajiyama, Tisato ; Sugiyama, Kenji ; Hirao, Akira. / Surface structure of asymmetric fluorinated block copolymers. :: Macromolecules. 2004 ; 巻 37, 番号 3. pp. 939-945.
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