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: Contribution to journalArticle査読

13 被引用数 (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.

本文言語英語
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
3
DOI
出版ステータス出版済み - 2 1 2004

All Science Journal Classification (ASJC) codes

  • ポリマーおよびプラスチック
  • 有機化学
  • 材料化学

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