Surface molecular motion in thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer

研究成果: ジャーナルへの寄稿記事

35 引用 (Scopus)

抄録

Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.

元の言語英語
ページ(範囲)476-482
ページ数7
ジャーナルActa Polymerica
46
発行部数6
DOI
出版物ステータス出版済み - 1 1 1995

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Methacrylates
Block copolymers
copolymers
Thin films
thin films
Photoelectrons
photoelectrons
Surface structure
glass transition temperature
molecular weight
X ray photoelectron spectroscopy
Molecular weight

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics

これを引用

Surface molecular motion in thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer. / Tanaka, Keiji; Takahara, Atsushi; Kajiyama, T.

:: Acta Polymerica, 巻 46, 番号 6, 01.01.1995, p. 476-482.

研究成果: ジャーナルへの寄稿記事

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abstract = "Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.",
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AB - Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.

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