Analysis of Surface Mobility in Polystyrene Films with Monodisperse and Bimodal Molecular Weights by Lateral Force Microscopy

Tisato Kajiyama, Keiji Tanaka, Atsushi Takahara

研究成果: ジャーナルへの寄稿記事

10 引用 (Scopus)

抄録

The surface glass-transition temperature (Tgs) in monodisperse polystyrene (PS) films was examined on the basis of the temperature dependence of the lateral force at a given scanning rate. T gs of the PS films was found to be markedly lower than the corresponding bulk glass-transition temperature over the entire molecular weight range (4900-1,460,000). Also, the apparent activation energy of the surface segmental motion in the PS films was 230 ± 10 kJ mol -1, significantly smaller than that for bulk PS. Finally, T gs measurement by lateral force microscopy was applied to binary PS mixtures with different molecular weights. On the basis of the Gordon-Taylor equation, the surface composition of the shorter component in the blend films was successfully obtained.

元の言語英語
ページ(範囲)639-647
ページ数9
ジャーナルJournal of Polymer Science, Part A: Polymer Chemistry
42
発行部数3
DOI
出版物ステータス出版済み - 2 1 2004

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Polystyrenes
Microscopic examination
Molecular weight
Surface structure
Activation energy
Scanning
Temperature
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

これを引用

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abstract = "The surface glass-transition temperature (Tgs) in monodisperse polystyrene (PS) films was examined on the basis of the temperature dependence of the lateral force at a given scanning rate. T gs of the PS films was found to be markedly lower than the corresponding bulk glass-transition temperature over the entire molecular weight range (4900-1,460,000). Also, the apparent activation energy of the surface segmental motion in the PS films was 230 ± 10 kJ mol -1, significantly smaller than that for bulk PS. Finally, T gs measurement by lateral force microscopy was applied to binary PS mixtures with different molecular weights. On the basis of the Gordon-Taylor equation, the surface composition of the shorter component in the blend films was successfully obtained.",
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AB - The surface glass-transition temperature (Tgs) in monodisperse polystyrene (PS) films was examined on the basis of the temperature dependence of the lateral force at a given scanning rate. T gs of the PS films was found to be markedly lower than the corresponding bulk glass-transition temperature over the entire molecular weight range (4900-1,460,000). Also, the apparent activation energy of the surface segmental motion in the PS films was 230 ± 10 kJ mol -1, significantly smaller than that for bulk PS. Finally, T gs measurement by lateral force microscopy was applied to binary PS mixtures with different molecular weights. On the basis of the Gordon-Taylor equation, the surface composition of the shorter component in the blend films was successfully obtained.

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